treewide: Per RFC45, remove all unquoted URLs

230 files changed, 245 insertions, 245 deletions

diff --git a/pkgs/applications/science/astronomy/astrolabe-generator/default.nix b/pkgs/applications/science/astronomy/astrolabe-generator/default.nix
index 32d89866b5a..cb3f3131ea1 100644
--- a/pkgs/applications/science/astronomy/astrolabe-generator/default.nix
+++ b/pkgs/applications/science/astronomy/astrolabe-generator/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib;{
-    homepage = https://www.astrolabeproject.com;
+    homepage = "https://www.astrolabeproject.com";
     description = "A Java-based tool for generating EPS files for constructing astrolabes and related tools";
     license = licenses.gpl3;
     maintainers = [ maintainers.genesis ];
diff --git a/pkgs/applications/science/astronomy/celestia/default.nix b/pkgs/applications/science/astronomy/celestia/default.nix
index e72354c8658..340641917e4 100644
--- a/pkgs/applications/science/astronomy/celestia/default.nix
+++ b/pkgs/applications/science/astronomy/celestia/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Free space simulation";
-    homepage = https://celestia.space/;
+    homepage = "https://celestia.space/";
     license = stdenv.lib.licenses.gpl2;
 
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/astronomy/gildas/default.nix b/pkgs/applications/science/astronomy/gildas/default.nix
index 9908439e10d..38d8e23a811 100644
--- a/pkgs/applications/science/astronomy/gildas/default.nix
+++ b/pkgs/applications/science/astronomy/gildas/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
       extensible. GILDAS is written in Fortran-90, with a
       few parts in C/C++ (mainly keyboard interaction,
       plotting, widgets).'';
-    homepage = http://www.iram.fr/IRAMFR/GILDAS/gildas.html;
+    homepage = "http://www.iram.fr/IRAMFR/GILDAS/gildas.html";
     license = stdenv.lib.licenses.free;
     maintainers = [ stdenv.lib.maintainers.bzizou stdenv.lib.maintainers.smaret ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/applications/science/astronomy/gpredict/default.nix b/pkgs/applications/science/astronomy/gpredict/default.nix
index f36431beac1..1ae80c0b0aa 100644
--- a/pkgs/applications/science/astronomy/gpredict/default.nix
+++ b/pkgs/applications/science/astronomy/gpredict/default.nix
@@ -28,7 +28,7 @@ in stdenv.mkDerivation {
     '';
     license = licenses.gpl2;
     platforms = platforms.linux;
-    homepage = http://gpredict.oz9aec.net/;
+    homepage = "http://gpredict.oz9aec.net/";
     maintainers = [ maintainers.markuskowa maintainers.cmcdragonkai ];
   };
 }
diff --git a/pkgs/applications/science/astronomy/gravit/default.nix b/pkgs/applications/science/astronomy/gravit/default.nix
index 15f72938eff..0a98563ed0e 100644
--- a/pkgs/applications/science/astronomy/gravit/default.nix
+++ b/pkgs/applications/science/astronomy/gravit/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = {
-    homepage = https://gravit.slowchop.com;
+    homepage = "https://gravit.slowchop.com";
     description = "Beautiful OpenGL-based gravity simulator";
     license = stdenv.lib.licenses.gpl2;
 
diff --git a/pkgs/applications/science/astronomy/openspace/default.nix b/pkgs/applications/science/astronomy/openspace/default.nix
index cfdd320d201..566fd61f1a7 100644
--- a/pkgs/applications/science/astronomy/openspace/default.nix
+++ b/pkgs/applications/science/astronomy/openspace/default.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
 
       WARNING: This build is not very usable for now.
     '';
-    homepage  = https://www.openspaceproject.com/;
+    homepage  = "https://www.openspaceproject.com/";
     license   = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.linux;
     broken = true; # fails to build
diff --git a/pkgs/applications/science/astronomy/stellarium/default.nix b/pkgs/applications/science/astronomy/stellarium/default.nix
index 3cb34576c46..a0cd535f362 100644
--- a/pkgs/applications/science/astronomy/stellarium/default.nix
+++ b/pkgs/applications/science/astronomy/stellarium/default.nix
@@ -24,7 +24,7 @@ mkDerivation rec {
 
   meta = with lib; {
     description = "Free open-source planetarium";
-    homepage = http://stellarium.org/;
+    homepage = "http://stellarium.org/";
     license = licenses.gpl2;
 
     platforms = platforms.linux; # should be mesaPlatforms, but we don't have qt on darwin
diff --git a/pkgs/applications/science/astronomy/xplanet/default.nix b/pkgs/applications/science/astronomy/xplanet/default.nix
index f306f9265ab..a314678b6ea 100644
--- a/pkgs/applications/science/astronomy/xplanet/default.nix
+++ b/pkgs/applications/science/astronomy/xplanet/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Renders an image of the earth or other planets into the X root window";
-    homepage = http://xplanet.sourceforge.net;
+    homepage = "http://xplanet.sourceforge.net";
     license = licenses.gpl2;
     maintainers = with maintainers; [ lassulus sander ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/biology/ants/default.nix b/pkgs/applications/science/biology/ants/default.nix
index 6e1a2a3407e..20eedfaaa16 100644
--- a/pkgs/applications/science/biology/ants/default.nix
+++ b/pkgs/applications/science/biology/ants/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/ANTsX/ANTs;
+    homepage = "https://github.com/ANTsX/ANTs";
     description = "Advanced normalization toolkit for medical image registration and other processing";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/aragorn/default.nix b/pkgs/applications/science/biology/aragorn/default.nix
index a5f0ebc18ab..956e4d88453 100644
--- a/pkgs/applications/science/biology/aragorn/default.nix
+++ b/pkgs/applications/science/biology/aragorn/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Detects tRNA, mtRNA, and tmRNA genes in nucleotide sequences";
-    homepage = http://mbio-serv2.mbioekol.lu.se/ARAGORN/;
+    homepage = "http://mbio-serv2.mbioekol.lu.se/ARAGORN/";
     license = licenses.gpl2;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/bcftools/default.nix b/pkgs/applications/science/biology/bcftools/default.nix
index 4a6a464de46..b847fd8b5fe 100644
--- a/pkgs/applications/science/biology/bcftools/default.nix
+++ b/pkgs/applications/science/biology/bcftools/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Tools for manipulating BCF2/VCF/gVCF format, SNP and short indel sequence variants";
     license = licenses.mit;
-    homepage = http://www.htslib.org/;
+    homepage = "http://www.htslib.org/";
     platforms = platforms.unix;
     maintainers = [ maintainers.mimame ];
   };
diff --git a/pkgs/applications/science/biology/bedtools/default.nix b/pkgs/applications/science/biology/bedtools/default.nix
index 9af2ec88c39..332e06ea0cf 100644
--- a/pkgs/applications/science/biology/bedtools/default.nix
+++ b/pkgs/applications/science/biology/bedtools/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A powerful toolset for genome arithmetic.";
     license = licenses.gpl2;
-    homepage = https://bedtools.readthedocs.io/en/latest/;
+    homepage = "https://bedtools.readthedocs.io/en/latest/";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.unix;
   };
diff --git a/pkgs/applications/science/biology/bftools/default.nix b/pkgs/applications/science/biology/bftools/default.nix
index 29e8bca5262..2ecefee340f 100644
--- a/pkgs/applications/science/biology/bftools/default.nix
+++ b/pkgs/applications/science/biology/bftools/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     description = "A bundle of scripts for using Bio-Formats on the command line with bioformats_package.jar already included";
     license = licenses.gpl2;
     platforms = platforms.all;
-    homepage = https://www.openmicroscopy.org/bio-formats/;
+    homepage = "https://www.openmicroscopy.org/bio-formats/";
     maintainers = [ maintainers.tbenst ];
   };
 }
diff --git a/pkgs/applications/science/biology/blast/default.nix b/pkgs/applications/science/biology/blast/default.nix
index ad737c6699d..95a1b905e9e 100644
--- a/pkgs/applications/science/biology/blast/default.nix
+++ b/pkgs/applications/science/biology/blast/default.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = ''Basic Local Alignment Search Tool (BLAST) finds regions of
     similarity between biological sequences'';
-    homepage = https://blast.ncbi.nlm.nih.gov/Blast.cgi;
+    homepage = "https://blast.ncbi.nlm.nih.gov/Blast.cgi";
     license = licenses.publicDomain;
 
     # Version 2.10.0 fails on Darwin
diff --git a/pkgs/applications/science/biology/bowtie2/default.nix b/pkgs/applications/science/biology/bowtie2/default.nix
index 962428d67cf..dc818e2fb86 100644
--- a/pkgs/applications/science/biology/bowtie2/default.nix
+++ b/pkgs/applications/science/biology/bowtie2/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "An ultrafast and memory-efficient tool for aligning sequencing reads to long reference sequences";
     license = licenses.gpl3;
-    homepage = http://bowtie-bio.sf.net/bowtie2;
+    homepage = "http://bowtie-bio.sf.net/bowtie2";
     maintainers = with maintainers; [ rybern ];
     platforms = platforms.all;
     broken = stdenv.isAarch64;
diff --git a/pkgs/applications/science/biology/bwa/default.nix b/pkgs/applications/science/biology/bwa/default.nix
index 5e39320bf83..e478c104ede 100644
--- a/pkgs/applications/science/biology/bwa/default.nix
+++ b/pkgs/applications/science/biology/bwa/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A software package for mapping low-divergent sequences against a large reference genome, such as the human genome";
     license     = licenses.gpl3;
-    homepage    = http://bio-bwa.sourceforge.net/;
+    homepage    = "http://bio-bwa.sourceforge.net/";
     maintainers = with maintainers; [ luispedro ];
     platforms = [ "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/biology/cd-hit/default.nix b/pkgs/applications/science/biology/cd-hit/default.nix
index 1a41a28a19a..0db788b0f74 100644
--- a/pkgs/applications/science/biology/cd-hit/default.nix
+++ b/pkgs/applications/science/biology/cd-hit/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
   meta = with stdenv.lib; {
     description = "Clustering and comparing protein or nucleotide sequences";
-    homepage = http://weizhongli-lab.org/cd-hit/;
+    homepage = "http://weizhongli-lab.org/cd-hit/";
     license = licenses.gpl2;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/clustal-omega/default.nix b/pkgs/applications/science/biology/clustal-omega/default.nix
index 00acc25028c..71cf8798537 100644
--- a/pkgs/applications/science/biology/clustal-omega/default.nix
+++ b/pkgs/applications/science/biology/clustal-omega/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "General purpose multiple sequence alignment program for protein and DNA/RNA";
-    homepage = http://www.clustal.org/omega/;
+    homepage = "http://www.clustal.org/omega/";
     license = licenses.gpl2;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/cmtk/default.nix b/pkgs/applications/science/biology/cmtk/default.nix
index 1ebfa2fca57..41805c15aed 100644
--- a/pkgs/applications/science/biology/cmtk/default.nix
+++ b/pkgs/applications/science/biology/cmtk/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ tbenst ];
     platforms = platforms.all;
     license     = licenses.gpl3;
-    homepage    = https://www.nitrc.org/projects/cmtk/;
+    homepage    = "https://www.nitrc.org/projects/cmtk/";
   };
 }
diff --git a/pkgs/applications/science/biology/conglomerate/default.nix b/pkgs/applications/science/biology/conglomerate/default.nix
index 23182fcadc6..971e2f23055 100644
--- a/pkgs/applications/science/biology/conglomerate/default.nix
+++ b/pkgs/applications/science/biology/conglomerate/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/BIC-MNI/conglomerate;
+    homepage = "https://github.com/BIC-MNI/conglomerate";
     description = "More command-line utilities for working with MINC files";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/dcm2niix/default.nix b/pkgs/applications/science/biology/dcm2niix/default.nix
index 7c328034a30..8ea3588fa8c 100644
--- a/pkgs/applications/science/biology/dcm2niix/default.nix
+++ b/pkgs/applications/science/biology/dcm2niix/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
       dcm2niix is a designed to convert neuroimaging data from the
       DICOM format to the NIfTI format.
     '';
-    homepage = https://www.nitrc.org/projects/dcm2nii;
+    homepage = "https://www.nitrc.org/projects/dcm2nii";
     license = licenses.bsd3;
     maintainers = [ maintainers.ashgillman ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/biology/diamond/default.nix b/pkgs/applications/science/biology/diamond/default.nix
index c1d20a11ca9..dd1e13ec716 100644
--- a/pkgs/applications/science/biology/diamond/default.nix
+++ b/pkgs/applications/science/biology/diamond/default.nix
@@ -31,10 +31,10 @@ stdenv.mkDerivation {
       "Fast and sensitive protein alignment using DIAMOND",
       Nature Methods 12, 59-60 (2015).
         '';
-    homepage = https://github.com/bbuchfink/diamond;
+    homepage = "https://github.com/bbuchfink/diamond";
     license = {
       fullName = "University of Tuebingen, Benjamin Buchfink";
-      url = https://raw.githubusercontent.com/bbuchfink/diamond/master/src/COPYING;
+      url = "https://raw.githubusercontent.com/bbuchfink/diamond/master/src/COPYING";
     };
     maintainers = [ maintainers.metabar ];
   };
diff --git a/pkgs/applications/science/biology/ecopcr/default.nix b/pkgs/applications/science/biology/ecopcr/default.nix
index 9e1b16ff944..2e744c7b2b9 100644
--- a/pkgs/applications/science/biology/ecopcr/default.nix
+++ b/pkgs/applications/science/biology/ecopcr/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
       coverage and barcode specificity. New barcode primers can be
       developed using the ecoPrimers software.
     '';
-    homepage = https://git.metabarcoding.org/obitools/ecopcr/wikis/home;
+    homepage = "https://git.metabarcoding.org/obitools/ecopcr/wikis/home";
     license = licenses.cecill20;
     maintainers = [ maintainers.metabar ];
   };
diff --git a/pkgs/applications/science/biology/eggnog-mapper/default.nix b/pkgs/applications/science/biology/eggnog-mapper/default.nix
index e11f4ebf77c..3ef52e54393 100644
--- a/pkgs/applications/science/biology/eggnog-mapper/default.nix
+++ b/pkgs/applications/science/biology/eggnog-mapper/default.nix
@@ -33,7 +33,7 @@ python27Packages.buildPythonApplication rec {
   meta = with stdenv.lib; {
     description = "Fast genome-wide functional annotation through orthology assignment";
     license = licenses.gpl2;
-    homepage = https://github.com/eggnogdb/eggnog-mapper/wiki;
+    homepage = "https://github.com/eggnogdb/eggnog-mapper/wiki";
     maintainers = with maintainers; [ luispedro ];
     platforms = platforms.all;
   };
diff --git a/pkgs/applications/science/biology/emboss/default.nix b/pkgs/applications/science/biology/emboss/default.nix
index 2110a9bcfab..e2374bcd1e2 100644
--- a/pkgs/applications/science/biology/emboss/default.nix
+++ b/pkgs/applications/science/biology/emboss/default.nix
@@ -23,6 +23,6 @@ stdenv.mkDerivation {
     data in a variety of formats and even allows transparent retrieval of
     sequence data from the web.''; 
     license     = "GPL2";
-    homepage    = http://emboss.sourceforge.net/;
+    homepage    = "http://emboss.sourceforge.net/";
   };
 }
diff --git a/pkgs/applications/science/biology/est-sfs/default.nix b/pkgs/applications/science/biology/est-sfs/default.nix
index dcc72523355..1b15c06c670 100644
--- a/pkgs/applications/science/biology/est-sfs/default.nix
+++ b/pkgs/applications/science/biology/est-sfs/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://sourceforge.net/projects/est-usfs;
+    homepage = "https://sourceforge.net/projects/est-usfs";
     description = "Estimate the unfolded site frequency spectrum and ancestral states";
     license = licenses.gpl3;
     maintainers = [ maintainers.bzizou ];
diff --git a/pkgs/applications/science/biology/exonerate/default.nix b/pkgs/applications/science/biology/exonerate/default.nix
index 1dd6b44692a..b2c49ab0076 100644
--- a/pkgs/applications/science/biology/exonerate/default.nix
+++ b/pkgs/applications/science/biology/exonerate/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Generic tool for sequence alignment";
-    homepage = https://www.ebi.ac.uk/about/vertebrate-genomics/software/exonerate;
+    homepage = "https://www.ebi.ac.uk/about/vertebrate-genomics/software/exonerate";
     license = licenses.gpl3;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix ;
diff --git a/pkgs/applications/science/biology/freebayes/default.nix b/pkgs/applications/science/biology/freebayes/default.nix
index 7d0a36e755f..bd80df56cb9 100644
--- a/pkgs/applications/science/biology/freebayes/default.nix
+++ b/pkgs/applications/science/biology/freebayes/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Bayesian haplotype-based polymorphism discovery and genotyping";
     license     = licenses.mit;
-    homepage    = https://github.com/ekg/freebayes;
+    homepage    = "https://github.com/ekg/freebayes";
     maintainers = with maintainers; [ jdagilliland ];
     platforms = [ "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/biology/hisat2/default.nix b/pkgs/applications/science/biology/hisat2/default.nix
index 82485630114..fb7f2cba3de 100644
--- a/pkgs/applications/science/biology/hisat2/default.nix
+++ b/pkgs/applications/science/biology/hisat2/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Graph based aligner";
     license = licenses.gpl3;
-    homepage = https://ccb.jhu.edu/software/hisat2/index.shtml;
+    homepage = "https://ccb.jhu.edu/software/hisat2/index.shtml";
     maintainers = with maintainers; [ jbedo ];
     platforms = [ "x86_64-linux" "i686-linux" ];
   };
diff --git a/pkgs/applications/science/biology/hmmer/default.nix b/pkgs/applications/science/biology/hmmer/default.nix
index 69ecb228697..3786b62f747 100644
--- a/pkgs/applications/science/biology/hmmer/default.nix
+++ b/pkgs/applications/science/biology/hmmer/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
       HMMER is designed to detect remote homologs as sensitively as possible, relying on the strength of its underlying probability models. In the past, this strength came at significant computational expense, but as of the new HMMER3 project, HMMER is now essentially as fast as BLAST.
       HMMER can be downloaded and installed as a command line tool on your own hardware, and now it is also more widely accessible to the scientific community via new search servers at the European Bioinformatics Institute.
     '';
-    homepage = http://hmmer.org/;
+    homepage = "http://hmmer.org/";
     license = licenses.gpl3;
     maintainers = [ maintainers.iimog ];
     platforms = [ "x86_64-linux" "i686-linux" ];
diff --git a/pkgs/applications/science/biology/igv/default.nix b/pkgs/applications/science/biology/igv/default.nix
index 04699a84b69..aa6c95071b7 100644
--- a/pkgs/applications/science/biology/igv/default.nix
+++ b/pkgs/applications/science/biology/igv/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://www.broadinstitute.org/igv/;
+    homepage = "https://www.broadinstitute.org/igv/";
     description = "A visualization tool for interactive exploration of genomic datasets";
     license = licenses.lgpl21;
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/itsx/default.nix b/pkgs/applications/science/biology/itsx/default.nix
index 1ba8cdf22ba..ac534a4ec3c 100644
--- a/pkgs/applications/science/biology/itsx/default.nix
+++ b/pkgs/applications/science/biology/itsx/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Improved software detection and extraction of ITS1 and ITS2 from ribosomal ITS sequences of fungi and other eukaryotes for use in environmental sequencing";
-    homepage = https://microbiology.se/software/itsx/;
+    homepage = "https://microbiology.se/software/itsx/";
     license = licenses.gpl3;
     maintainers = [ maintainers.bzizou ];
     platforms = [ "x86_64-linux" "i686-linux" ];
diff --git a/pkgs/applications/science/biology/iv/default.nix b/pkgs/applications/science/biology/iv/default.nix
index 37abcf39621..82fe3694008 100644
--- a/pkgs/applications/science/biology/iv/default.nix
+++ b/pkgs/applications/science/biology/iv/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec
     meta = with stdenv.lib;
       { description = "InterViews graphical library for Neuron";
         license     = licenses.bsd3;
-        homepage    = http://www.neuron.yale.edu/neuron;
+        homepage    = "http://www.neuron.yale.edu/neuron";
         platforms   = platforms.all;
       };
   }
diff --git a/pkgs/applications/science/biology/megahit/default.nix b/pkgs/applications/science/biology/megahit/default.nix
index 86414980177..35ef280ed67 100644
--- a/pkgs/applications/science/biology/megahit/default.nix
+++ b/pkgs/applications/science/biology/megahit/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "An ultra-fast single-node solution for large and complex metagenomics assembly via succinct de Bruijn graph";
     license     = licenses.gpl3;
-    homepage    = https://github.com/voutcn/megahit;
+    homepage    = "https://github.com/voutcn/megahit";
     maintainers = with maintainers; [ luispedro ];
     platforms = [ "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/biology/messer-slim/default.nix b/pkgs/applications/science/biology/messer-slim/default.nix
index d485666f393..201e38cfc53 100644
--- a/pkgs/applications/science/biology/messer-slim/default.nix
+++ b/pkgs/applications/science/biology/messer-slim/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
      description = "An evolutionary simulation framework";
-     homepage = https://messerlab.org/slim/;
+     homepage = "https://messerlab.org/slim/";
      license = with stdenv.lib.licenses; [ gpl3 ];
      maintainers = with stdenv.lib.maintainers; [ bzizou ];
      platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/applications/science/biology/migrate/default.nix b/pkgs/applications/science/biology/migrate/default.nix
index d80e6e7b30d..0e2aa1c1a79 100644
--- a/pkgs/applications/science/biology/migrate/default.nix
+++ b/pkgs/applications/science/biology/migrate/default.nix
@@ -16,7 +16,7 @@ gccStdenv.mkDerivation rec {
 
   meta = with gccStdenv.lib; {
     description = "Estimates population size, migration, population splitting parameters using genetic/genomic data";
-    homepage = https://peterbeerli.com/migrate-html5/index.html;
+    homepage = "https://peterbeerli.com/migrate-html5/index.html";
     license = licenses.mit;
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/minc-tools/default.nix b/pkgs/applications/science/biology/minc-tools/default.nix
index 4c8b768a56a..db803ea4922 100644
--- a/pkgs/applications/science/biology/minc-tools/default.nix
+++ b/pkgs/applications/science/biology/minc-tools/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/BIC-MNI/minc-tools;
+    homepage = "https://github.com/BIC-MNI/minc-tools";
     description = "Command-line utilities for working with MINC files";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/minimap2/default.nix b/pkgs/applications/science/biology/minimap2/default.nix
index bff2bcf428b..e33a1753791 100644
--- a/pkgs/applications/science/biology/minimap2/default.nix
+++ b/pkgs/applications/science/biology/minimap2/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   
   meta = with stdenv.lib; {
     description = "A versatile pairwise aligner for genomic and spliced nucleotide sequences";
-    homepage = https://lh3.github.io/minimap2;
+    homepage = "https://lh3.github.io/minimap2";
     license = licenses.mit;
     platforms = platforms.all;
     maintainers = [ maintainers.arcadio ];
diff --git a/pkgs/applications/science/biology/mni_autoreg/default.nix b/pkgs/applications/science/biology/mni_autoreg/default.nix
index ab22fb7232f..254d874f9d9 100644
--- a/pkgs/applications/science/biology/mni_autoreg/default.nix
+++ b/pkgs/applications/science/biology/mni_autoreg/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://github.com/BIC-MNI/mni_autoreg;
+    homepage = "https://github.com/BIC-MNI/mni_autoreg";
     description = "Tools for automated registration using the MINC image format";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/mosdepth/default.nix b/pkgs/applications/science/biology/mosdepth/default.nix
index 717b8c3ab2f..569c63afa7a 100644
--- a/pkgs/applications/science/biology/mosdepth/default.nix
+++ b/pkgs/applications/science/biology/mosdepth/default.nix
@@ -38,7 +38,7 @@ in stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "fast BAM/CRAM depth calculation for WGS, exome, or targeted sequencing.";
     license = licenses.mit;
-    homepage = https://github.com/brentp/mosdepth;
+    homepage = "https://github.com/brentp/mosdepth";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/science/biology/mrbayes/default.nix b/pkgs/applications/science/biology/mrbayes/default.nix
index 1dd92af58eb..8ee7bccf075 100644
--- a/pkgs/applications/science/biology/mrbayes/default.nix
+++ b/pkgs/applications/science/biology/mrbayes/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
       MCMC) to approximate the posterior probabilities of trees.
     '';
     license     = "GPL2";
-    homepage    = http://mrbayes.csit.fsu.edu/;
+    homepage    = "http://mrbayes.csit.fsu.edu/";
     platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/applications/science/biology/muscle/default.nix b/pkgs/applications/science/biology/muscle/default.nix
index 9cbabc7ab37..7ed18349259 100644
--- a/pkgs/applications/science/biology/muscle/default.nix
+++ b/pkgs/applications/science/biology/muscle/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A multiple sequence alignment method with reduced time and space complexity";
     license     = licenses.publicDomain;
-    homepage    = https://www.drive5.com/muscle/;
+    homepage    = "https://www.drive5.com/muscle/";
     maintainers = [ maintainers.unode ];
     # NOTE: Supposed to be compatible with darwin/intel & PPC but currently fails.
     # Anyone with access to these platforms is welcome to give it a try
diff --git a/pkgs/applications/science/biology/ncbi-tools/default.nix b/pkgs/applications/science/biology/ncbi-tools/default.nix
index 1c24ef09254..cc8ebf7f37d 100644
--- a/pkgs/applications/science/biology/ncbi-tools/default.nix
+++ b/pkgs/applications/science/biology/ncbi-tools/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = ''NCBI Bioinformatics toolbox (incl. BLAST)'';
     longDescription = ''The NCBI Bioinformatics toolsbox, including command-line utilties, libraries and include files. No X11 support'';
-    homepage = http://www.ncbi.nlm.nih.gov/IEB/ToolBox/; 
+    homepage = "http://www.ncbi.nlm.nih.gov/IEB/ToolBox/"; 
     license = "GPL";
     priority = 5;   # zlib.so gives a conflict with zlib
     broken = true;
diff --git a/pkgs/applications/science/biology/neuron/default.nix b/pkgs/applications/science/biology/neuron/default.nix
index 4e6d3494c72..8cad5f466c5 100644
--- a/pkgs/applications/science/biology/neuron/default.nix
+++ b/pkgs/applications/science/biology/neuron/default.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation rec {
                 involving many ion-specific channels, ion accumulation, and second messengers";
 
     license     = licenses.bsd3;
-    homepage    = http://www.neuron.yale.edu/neuron;
+    homepage    = "http://www.neuron.yale.edu/neuron";
     maintainers = [ maintainers.adev ];
     # source claims it's only tested for x86 and powerpc
     platforms   = platforms.x86_64 ++ platforms.i686;
diff --git a/pkgs/applications/science/biology/niftyreg/default.nix b/pkgs/applications/science/biology/niftyreg/default.nix
index 48bd1b21ecd..fd7dc4f1fbb 100644
--- a/pkgs/applications/science/biology/niftyreg/default.nix
+++ b/pkgs/applications/science/biology/niftyreg/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://cmictig.cs.ucl.ac.uk/wiki/index.php/NiftyReg;
+    homepage = "http://cmictig.cs.ucl.ac.uk/wiki/index.php/NiftyReg";
     description = "Medical image registration software";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/biology/niftyseg/default.nix b/pkgs/applications/science/biology/niftyseg/default.nix
index f70054e9771..38194697223 100644
--- a/pkgs/applications/science/biology/niftyseg/default.nix
+++ b/pkgs/applications/science/biology/niftyseg/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
-    homepage = http://cmictig.cs.ucl.ac.uk/research/software/software-nifty/niftyseg;
+    homepage = "http://cmictig.cs.ucl.ac.uk/research/software/software-nifty/niftyseg";
     description = "Software for medical image segmentation, bias field correction, and cortical thickness calculation";
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/biology/paml/default.nix b/pkgs/applications/science/biology/paml/default.nix
index 731e31c588f..7a2dc2782ab 100644
--- a/pkgs/applications/science/biology/paml/default.nix
+++ b/pkgs/applications/science/biology/paml/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     description     = "Phylogenetic Analysis by Maximum Likelihood (PAML)";
     longDescription = ''PAML is a package of programs for phylogenetic analyses of DNA or protein sequences using maximum likelihood. It is maintained and distributed for academic use free of charge by Ziheng Yang. ANSI C source codes are distributed for UNIX/Linux/Mac OSX, and executables are provided for MS Windows. PAML is not good for tree making. It may be used to estimate parameters and test hypotheses to study the evolutionary process, when you have reconstructed trees using other programs such as PAUP*, PHYLIP, MOLPHY, PhyML, RaxML, etc.'';
     license     = "non-commercial";
-    homepage    = http://abacus.gene.ucl.ac.uk/software/paml.html;
+    homepage    = "http://abacus.gene.ucl.ac.uk/software/paml.html";
   };
 }
diff --git a/pkgs/applications/science/biology/platypus/default.nix b/pkgs/applications/science/biology/platypus/default.nix
index 6907c6e3ec8..30e45d5af0e 100644
--- a/pkgs/applications/science/biology/platypus/default.nix
+++ b/pkgs/applications/science/biology/platypus/default.nix
@@ -31,7 +31,7 @@ in stdenv.mkDerivation {
   meta = with stdenv.lib; {
     description = "The Platypus variant caller";
     license = licenses.gpl3;
-    homepage = https://github.com/andyrimmer/Platypus;
+    homepage = "https://github.com/andyrimmer/Platypus";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.x86_64;
   };
diff --git a/pkgs/applications/science/biology/plink-ng/default.nix b/pkgs/applications/science/biology/plink-ng/default.nix
index 52f8f70b779..13f00c53fe6 100644
--- a/pkgs/applications/science/biology/plink-ng/default.nix
+++ b/pkgs/applications/science/biology/plink-ng/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A comprehensive update to the PLINK association analysis toolset";
-    homepage = https://www.cog-genomics.org/plink2;
+    homepage = "https://www.cog-genomics.org/plink2";
     license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/applications/science/biology/plink/default.nix b/pkgs/applications/science/biology/plink/default.nix
index cc48a0cb13a..009e12aa02f 100644
--- a/pkgs/applications/science/biology/plink/default.nix
+++ b/pkgs/applications/science/biology/plink/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   
   meta = {
     description = "Whole genome association toolkit";
-    homepage = http://pngu.mgh.harvard.edu/~purcell/plink/;
+    homepage = "http://pngu.mgh.harvard.edu/~purcell/plink/";
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.all;
     broken = true;
diff --git a/pkgs/applications/science/biology/poretools/default.nix b/pkgs/applications/science/biology/poretools/default.nix
index 4660a776ab2..a9f3fdb2467 100755
--- a/pkgs/applications/science/biology/poretools/default.nix
+++ b/pkgs/applications/science/biology/poretools/default.nix
@@ -16,7 +16,7 @@ pythonPackages.buildPythonPackage rec {
   meta = {
     description = "a toolkit for working with nanopore sequencing data from Oxford Nanopore";
     license = stdenv.lib.licenses.mit;
-    homepage = https://poretools.readthedocs.io/en/latest/;
+    homepage = "https://poretools.readthedocs.io/en/latest/";
     maintainers = [stdenv.lib.maintainers.rybern];
   };
 }
diff --git a/pkgs/applications/science/biology/prodigal/default.nix b/pkgs/applications/science/biology/prodigal/default.nix
index 653f4390488..ba51c93c38c 100644
--- a/pkgs/applications/science/biology/prodigal/default.nix
+++ b/pkgs/applications/science/biology/prodigal/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   
   meta = with stdenv.lib; {
     description = "Fast, reliable protein-coding gene prediction for prokaryotic genomes";
-    homepage = https://github.com/hyattpd/Prodigal;
+    homepage = "https://github.com/hyattpd/Prodigal";
     license = licenses.gpl3;
     platforms = platforms.all;
     maintainers = with maintainers; [ luispedro ];
diff --git a/pkgs/applications/science/biology/raxml/default.nix b/pkgs/applications/science/biology/raxml/default.nix
index d7ee54bfbcf..5c7353af931 100644
--- a/pkgs/applications/science/biology/raxml/default.nix
+++ b/pkgs/applications/science/biology/raxml/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A tool for Phylogenetic Analysis and Post-Analysis of Large Phylogenies";
     license = licenses.gpl3;
-    homepage = https://sco.h-its.org/exelixis/web/software/raxml/;
+    homepage = "https://sco.h-its.org/exelixis/web/software/raxml/";
     maintainers = [ maintainers.unode ];
     platforms = [ "i686-linux" "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/biology/samtools/default.nix b/pkgs/applications/science/biology/samtools/default.nix
index f2c5e9f25be..e750eea89ac 100644
--- a/pkgs/applications/science/biology/samtools/default.nix
+++ b/pkgs/applications/science/biology/samtools/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Tools for manipulating SAM/BAM/CRAM format";
     license = licenses.mit;
-    homepage = http://www.htslib.org/;
+    homepage = "http://www.htslib.org/";
     platforms = platforms.unix;
     maintainers = [ maintainers.mimame ];
   };
diff --git a/pkgs/applications/science/biology/samtools/samtools_0_1_19.nix b/pkgs/applications/science/biology/samtools/samtools_0_1_19.nix
index 72d125ef8b6..d62c2a1fe7b 100644
--- a/pkgs/applications/science/biology/samtools/samtools_0_1_19.nix
+++ b/pkgs/applications/science/biology/samtools/samtools_0_1_19.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Tools for manipulating SAM/BAM/CRAM format";
     license = licenses.mit;
-    homepage = http://samtools.sourceforge.net/;
+    homepage = "http://samtools.sourceforge.net/";
     platforms = platforms.unix;
     maintainers = [ maintainers.unode ];
   };
diff --git a/pkgs/applications/science/biology/snpeff/default.nix b/pkgs/applications/science/biology/snpeff/default.nix
index d700ee50a9c..c68fcfada33 100644
--- a/pkgs/applications/science/biology/snpeff/default.nix
+++ b/pkgs/applications/science/biology/snpeff/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Genetic variant annotation and effect prediction toolbox.";
     license = licenses.lgpl3;
-    homepage = http://snpeff.sourceforge.net/;
+    homepage = "http://snpeff.sourceforge.net/";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.all;
   };
diff --git a/pkgs/applications/science/biology/somatic-sniper/default.nix b/pkgs/applications/science/biology/somatic-sniper/default.nix
index 1961c71f43b..17d9c3dbb55 100644
--- a/pkgs/applications/science/biology/somatic-sniper/default.nix
+++ b/pkgs/applications/science/biology/somatic-sniper/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Identify single nucleotide positions that are different between tumor and normal";
     license = licenses.mit;
-    homepage = https://github.com/genome/somatic-sniper;
+    homepage = "https://github.com/genome/somatic-sniper";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/science/biology/sortmerna/default.nix b/pkgs/applications/science/biology/sortmerna/default.nix
index 4adce4461ed..1f291d1a700 100644
--- a/pkgs/applications/science/biology/sortmerna/default.nix
+++ b/pkgs/applications/science/biology/sortmerna/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     description = "Tools for filtering, mapping, and OTU-picking from shotgun genomics data";
     license = licenses.lgpl3;
     platforms = platforms.x86_64;
-    homepage = https://bioinfo.lifl.fr/RNA/sortmerna/;
+    homepage = "https://bioinfo.lifl.fr/RNA/sortmerna/";
     maintainers = with maintainers; [ luispedro ];
   };
 }
diff --git a/pkgs/applications/science/biology/strelka/default.nix b/pkgs/applications/science/biology/strelka/default.nix
index 184dcb48a0d..a32eddcb1cd 100644
--- a/pkgs/applications/science/biology/strelka/default.nix
+++ b/pkgs/applications/science/biology/strelka/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Germline and small variant caller";
     license = licenses.gpl3;
-    homepage = https://github.com/Illumina/strelka;
+    homepage = "https://github.com/Illumina/strelka";
     maintainers = with maintainers; [ jbedo ];
     platforms = [ "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/biology/sumatools/default.nix b/pkgs/applications/science/biology/sumatools/default.nix
index 5230fcd2eb6..1e3b479d54f 100644
--- a/pkgs/applications/science/biology/sumatools/default.nix
+++ b/pkgs/applications/science/biology/sumatools/default.nix
@@ -4,7 +4,7 @@ let
   stdenv = gccStdenv;
   meta = with stdenv.lib; {
     description = "Fast and exact comparison and clustering of sequences";
-    homepage = https://metabarcoding.org/sumatra;
+    homepage = "https://metabarcoding.org/sumatra";
     maintainers = [ maintainers.bzizou ];
     platforms = platforms.unix;
   };
diff --git a/pkgs/applications/science/biology/trimal/default.nix b/pkgs/applications/science/biology/trimal/default.nix
index d4e8fee7bc3..8d7e62b6143 100755
--- a/pkgs/applications/science/biology/trimal/default.nix
+++ b/pkgs/applications/science/biology/trimal/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     description = "A tool for the automated removal of spurious sequences or poorly aligned regions from a multiple sequence alignment";
     license = licenses.gpl3;
     platforms = platforms.linux;
-    homepage = http://trimal.cgenomics.org;
+    homepage = "http://trimal.cgenomics.org";
     maintainers = [ maintainers.bzizou ];
   };
 }
diff --git a/pkgs/applications/science/biology/varscan/default.nix b/pkgs/applications/science/biology/varscan/default.nix
index 697a444193b..e97c8f14451 100644
--- a/pkgs/applications/science/biology/varscan/default.nix
+++ b/pkgs/applications/science/biology/varscan/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     # through the Office of Technology Management at Washington
     # University School of Medicine.
     license = licenses.unfree;
-    homepage = https://github.com/dkoboldt/varscan;
+    homepage = "https://github.com/dkoboldt/varscan";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.all;
   };
diff --git a/pkgs/applications/science/biology/vcftools/default.nix b/pkgs/applications/science/biology/vcftools/default.nix
index f6c9ad029c1..52957b58bc9 100755
--- a/pkgs/applications/science/biology/vcftools/default.nix
+++ b/pkgs/applications/science/biology/vcftools/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     description = "A set of tools written in Perl and C++ for working with VCF files, such as those generated by the 1000 Genomes Project";
     license = licenses.lgpl3;
     platforms = platforms.linux;
-    homepage = https://vcftools.github.io/index.html;
+    homepage = "https://vcftools.github.io/index.html";
     maintainers = [ maintainers.rybern ];
   };
 }
diff --git a/pkgs/applications/science/chemistry/avogadro/default.nix b/pkgs/applications/science/chemistry/avogadro/default.nix
index 6aca678480d..96dea10333b 100644
--- a/pkgs/applications/science/chemistry/avogadro/default.nix
+++ b/pkgs/applications/science/chemistry/avogadro/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   patches = [
     (fetchurl {
-      url = https://data.gpo.zugaina.org/fusion809/sci-chemistry/avogadro/files/avogadro-1.1.0-xlibs.patch;
+      url = "https://data.gpo.zugaina.org/fusion809/sci-chemistry/avogadro/files/avogadro-1.1.0-xlibs.patch";
       sha256 = "1p113v19z3zwr9gxj2k599f8p97a8rwm93pa4amqvd0snn31mw0k";
     })
   ];
diff --git a/pkgs/applications/science/chemistry/gwyddion/default.nix b/pkgs/applications/science/chemistry/gwyddion/default.nix
index 644f609ed0a..dec63910f70 100644
--- a/pkgs/applications/science/chemistry/gwyddion/default.nix
+++ b/pkgs/applications/science/chemistry/gwyddion/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   # it is disabled.
   patches = [ ./codegen.patch ];
   meta = {
-    homepage = http://gwyddion.net/;
+    homepage = "http://gwyddion.net/";
 
     description = "Scanning probe microscopy data visualization and analysis";
 
diff --git a/pkgs/applications/science/chemistry/jmol/default.nix b/pkgs/applications/science/chemistry/jmol/default.nix
index 7259705bc80..f52621dd71a 100644
--- a/pkgs/applications/science/chemistry/jmol/default.nix
+++ b/pkgs/applications/science/chemistry/jmol/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
      description = "A Java 3D viewer for chemical structures";
-     homepage = https://sourceforge.net/projects/jmol;
+     homepage = "https://sourceforge.net/projects/jmol";
      license = licenses.lgpl2;
      platforms = platforms.all;
      maintainers = with maintainers; [ timokau mounium ];
diff --git a/pkgs/applications/science/chemistry/molden/default.nix b/pkgs/applications/science/chemistry/molden/default.nix
index 87dae3b14d9..5e5df85a527 100644
--- a/pkgs/applications/science/chemistry/molden/default.nix
+++ b/pkgs/applications/science/chemistry/molden/default.nix
@@ -31,10 +31,10 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
      description = "Display and manipulate molecular structures";
-     homepage = http://www.cmbi.ru.nl/molden/;
+     homepage = "http://www.cmbi.ru.nl/molden/";
      license = {
        fullName = "Free for academic/non-profit use";
-       url = http://www.cmbi.ru.nl/molden/CopyRight.html;
+       url = "http://www.cmbi.ru.nl/molden/CopyRight.html";
        free = false;
      };
      platforms = platforms.linux;
diff --git a/pkgs/applications/science/chemistry/octopus/default.nix b/pkgs/applications/science/chemistry/octopus/default.nix
index a5abbe2d1de..f8ce3e925fd 100644
--- a/pkgs/applications/science/chemistry/octopus/default.nix
+++ b/pkgs/applications/science/chemistry/octopus/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Real-space time dependent density-functional theory code";
-    homepage = https://octopus-code.org;
+    homepage = "https://octopus-code.org";
     maintainers = with maintainers; [ markuskowa ];
     license = licenses.gpl2;
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/chemistry/openmolcas/default.nix b/pkgs/applications/science/chemistry/openmolcas/default.nix
index d73e86d2f57..b1720e105fd 100644
--- a/pkgs/applications/science/chemistry/openmolcas/default.nix
+++ b/pkgs/applications/science/chemistry/openmolcas/default.nix
@@ -74,7 +74,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Advanced quantum chemistry software package";
-    homepage = https://gitlab.com/Molcas/OpenMolcas;
+    homepage = "https://gitlab.com/Molcas/OpenMolcas";
     maintainers = [ maintainers.markuskowa ];
     license = licenses.lgpl21;
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/chemistry/pymol/default.nix b/pkgs/applications/science/chemistry/pymol/default.nix
index e8b3b23ddd9..47498690122 100644
--- a/pkgs/applications/science/chemistry/pymol/default.nix
+++ b/pkgs/applications/science/chemistry/pymol/default.nix
@@ -50,7 +50,7 @@ python3Packages.buildPythonApplication rec {
 
   meta = with lib; {
     description = description;
-    homepage = https://www.pymol.org/;
+    homepage = "https://www.pymol.org/";
     license = licenses.mit;
     maintainers = with maintainers; [ samlich ];
   };
diff --git a/pkgs/applications/science/chemistry/siesta/default.nix b/pkgs/applications/science/chemistry/siesta/default.nix
index 9d7880f57df..11f3e551431 100644
--- a/pkgs/applications/science/chemistry/siesta/default.nix
+++ b/pkgs/applications/science/chemistry/siesta/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation {
          matching the quality of other approaches, such as plane-wave
          and all-electron methods.
       '';
-    homepage = https://www.quantum-espresso.org/;
+    homepage = "https://www.quantum-espresso.org/";
     license = licenses.gpl2;
     platforms = [ "x86_64-linux" ];
     maintainers = [ maintainers.costrouc ];
diff --git a/pkgs/applications/science/electronics/adms/default.nix b/pkgs/applications/science/electronics/adms/default.nix
index 8b95e73b891..f55dd2f0528 100644
--- a/pkgs/applications/science/electronics/adms/default.nix
+++ b/pkgs/applications/science/electronics/adms/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "automatic device model synthesizer";
-    homepage = https://github.com/Qucs/adms;
+    homepage = "https://github.com/Qucs/adms";
     license = stdenv.lib.licenses.gpl3;
     maintainers = with stdenv.lib.maintainers; [disassembler];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/electronics/alliance/default.nix b/pkgs/applications/science/electronics/alliance/default.nix
index c863fe6aea8..861f6cea0b4 100644
--- a/pkgs/applications/science/electronics/alliance/default.nix
+++ b/pkgs/applications/science/electronics/alliance/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Complete set of free CAD tools and portable libraries for VLSI design";
-    homepage = http://www-asim.lip6.fr/recherche/alliance/;
+    homepage = "http://www-asim.lip6.fr/recherche/alliance/";
     license = with licenses; gpl2Plus;
     maintainers = with maintainers; [ ];
     platforms = with platforms; linux;
diff --git a/pkgs/applications/science/electronics/archimedes/default.nix b/pkgs/applications/science/electronics/archimedes/default.nix
index 016760bde02..1377231c152 100644
--- a/pkgs/applications/science/electronics/archimedes/default.nix
+++ b/pkgs/applications/science/electronics/archimedes/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "GNU package for semiconductor device simulations";
-    homepage = https://www.gnu.org/software/archimedes;
+    homepage = "https://www.gnu.org/software/archimedes";
     license = stdenv.lib.licenses.gpl2Plus;
     platforms = with stdenv.lib.platforms; linux;
   };
diff --git a/pkgs/applications/science/electronics/bitscope/common.nix b/pkgs/applications/science/electronics/bitscope/common.nix
index 9101f1fdbe5..acbdeb8cfaa 100644
--- a/pkgs/applications/science/electronics/bitscope/common.nix
+++ b/pkgs/applications/science/electronics/bitscope/common.nix
@@ -23,7 +23,7 @@ let
     name = "${toolName}-${version}";
 
     meta = with stdenv.lib; {
-      homepage = http://bitscope.com/software/;
+      homepage = "http://bitscope.com/software/";
       license = licenses.unfree;
       platforms = [ "x86_64-linux" ];
       maintainers = with maintainers; [
diff --git a/pkgs/applications/science/electronics/caneda/default.nix b/pkgs/applications/science/electronics/caneda/default.nix
index ff41a498ae7..6f832013e8c 100644
--- a/pkgs/applications/science/electronics/caneda/default.nix
+++ b/pkgs/applications/science/electronics/caneda/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Open source EDA software focused on easy of use and portability";
-    homepage = http://caneda.org;
+    homepage = "http://caneda.org";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/electronics/dsview/default.nix b/pkgs/applications/science/electronics/dsview/default.nix
index 1e125964d50..4d3acb331d5 100644
--- a/pkgs/applications/science/electronics/dsview/default.nix
+++ b/pkgs/applications/science/electronics/dsview/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A GUI program for supporting various instruments from DreamSourceLab, including logic analyzer, oscilloscope, etc";
-    homepage = https://www.dreamsourcelab.com/;
+    homepage = "https://www.dreamsourcelab.com/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.bachp ];
diff --git a/pkgs/applications/science/electronics/dsview/libsigrok4dsl.nix b/pkgs/applications/science/electronics/dsview/libsigrok4dsl.nix
index f5f3ce7435a..7915cb0ba4a 100644
--- a/pkgs/applications/science/electronics/dsview/libsigrok4dsl.nix
+++ b/pkgs/applications/science/electronics/dsview/libsigrok4dsl.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A fork of the sigrok library for usage with DSView";
-    homepage = https://www.dreamsourcelab.com/;
+    homepage = "https://www.dreamsourcelab.com/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.bachp ];
diff --git a/pkgs/applications/science/electronics/dsview/libsigrokdecode4dsl.nix b/pkgs/applications/science/electronics/dsview/libsigrokdecode4dsl.nix
index b7fe5140864..72b2fa1b685 100644
--- a/pkgs/applications/science/electronics/dsview/libsigrokdecode4dsl.nix
+++ b/pkgs/applications/science/electronics/dsview/libsigrokdecode4dsl.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A fork of the sigrokdecode library for usage with DSView";
-    homepage = https://www.dreamsourcelab.com/;
+    homepage = "https://www.dreamsourcelab.com/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = [ maintainers.bachp ];
diff --git a/pkgs/applications/science/electronics/eagle/eagle7.nix b/pkgs/applications/science/electronics/eagle/eagle7.nix
index a9528b05a31..af0fb675880 100644
--- a/pkgs/applications/science/electronics/eagle/eagle7.nix
+++ b/pkgs/applications/science/electronics/eagle/eagle7.nix
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Schematic editor and PCB layout tool from CadSoft";
-    homepage = http://www.cadsoftusa.com/;
+    homepage = "http://www.cadsoftusa.com/";
     license = licenses.unfree;
     platforms = platforms.linux;
     maintainers = [ maintainers.bjornfor ];
diff --git a/pkgs/applications/science/electronics/fped/default.nix b/pkgs/applications/science/electronics/fped/default.nix
index f93fddba8cb..9ef47ae2634 100644
--- a/pkgs/applications/science/electronics/fped/default.nix
+++ b/pkgs/applications/science/electronics/fped/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "An editor that allows the interactive creation of footprints electronic components";
-    homepage = http://projects.qi-hardware.com/index.php/p/fped/;
+    homepage = "http://projects.qi-hardware.com/index.php/p/fped/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ expipiplus1 ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/electronics/fritzing/default.nix b/pkgs/applications/science/electronics/fritzing/default.nix
index 127e9c05624..a0442db7fed 100644
--- a/pkgs/applications/science/electronics/fritzing/default.nix
+++ b/pkgs/applications/science/electronics/fritzing/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "An open source prototyping tool for Arduino-based projects";
-    homepage = http://fritzing.org/;
+    homepage = "http://fritzing.org/";
     license = stdenv.lib.licenses.gpl3;
     maintainers = [ stdenv.lib.maintainers.robberer ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/electronics/geda/default.nix b/pkgs/applications/science/electronics/geda/default.nix
index 1aaa5496ff3..54ab7ec57e2 100644
--- a/pkgs/applications/science/electronics/geda/default.nix
+++ b/pkgs/applications/science/electronics/geda/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Full GPL'd suite of Electronic Design Automation tools";
-    homepage = http://www.geda-project.org/;
+    homepage = "http://www.geda-project.org/";
     maintainers = with maintainers; [ pjones ];
     platforms = platforms.linux;
     license = licenses.gpl2;
diff --git a/pkgs/applications/science/electronics/gerbv/default.nix b/pkgs/applications/science/electronics/gerbv/default.nix
index fa5bdbbebdb..b0317551df8 100644
--- a/pkgs/applications/science/electronics/gerbv/default.nix
+++ b/pkgs/applications/science/electronics/gerbv/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   version = "2015-10-08";
 
   src = fetchgit {
-    url = git://git.geda-project.org/gerbv.git;
+    url = "git://git.geda-project.org/gerbv.git";
     rev = "76b8b67bfa10823ce98f1c4c3b49a2afcadf7659";
     sha256 = "00jn1xhf6kblxc5gac1wvk8zm12fy6sk81nj3jwdag0z6wk3z446";
   };
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A Gerber (RS-274X) viewer";
-    homepage = http://gerbv.geda-project.org/;
+    homepage = "http://gerbv.geda-project.org/";
     maintainers = with maintainers; [ mog ];
     platforms = platforms.linux;
     license = licenses.gpl2;
diff --git a/pkgs/applications/science/electronics/gtkwave/default.nix b/pkgs/applications/science/electronics/gtkwave/default.nix
index 694adc4d634..3d75780936e 100644
--- a/pkgs/applications/science/electronics/gtkwave/default.nix
+++ b/pkgs/applications/science/electronics/gtkwave/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "VCD/Waveform viewer for Unix and Win32";
-    homepage    = http://gtkwave.sourceforge.net;
+    homepage    = "http://gtkwave.sourceforge.net";
     license     = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice ];
     platforms   = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/electronics/librepcb/default.nix b/pkgs/applications/science/electronics/librepcb/default.nix
index dacbd948241..7e0894fb337 100644
--- a/pkgs/applications/science/electronics/librepcb/default.nix
+++ b/pkgs/applications/science/electronics/librepcb/default.nix
@@ -31,7 +31,7 @@ mkDerivation {
 
   meta = with lib; {
     description = "A free EDA software to develop printed circuit boards";
-    homepage = https://librepcb.org/;
+    homepage = "https://librepcb.org/";
     maintainers = with maintainers; [ luz ];
     license = licenses.gpl3;
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/electronics/ngspice/default.nix b/pkgs/applications/science/electronics/ngspice/default.nix
index f044f1d88e7..951e5f66f6e 100644
--- a/pkgs/applications/science/electronics/ngspice/default.nix
+++ b/pkgs/applications/science/electronics/ngspice/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "The Next Generation Spice (Electronic Circuit Simulator)";
-    homepage = http://ngspice.sourceforge.net;
+    homepage = "http://ngspice.sourceforge.net";
     license = with licenses; [ "BSD" gpl2 ];
     maintainers = with maintainers; [ bgamari rongcuid ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/electronics/pcb/default.nix b/pkgs/applications/science/electronics/pcb/default.nix
index 636c494c340..4309f52e8b1 100644
--- a/pkgs/applications/science/electronics/pcb/default.nix
+++ b/pkgs/applications/science/electronics/pcb/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Printed Circuit Board editor";
-    homepage = http://pcb.geda-project.org/;
+    homepage = "http://pcb.geda-project.org/";
     maintainers = with maintainers; [ mog ];
     platforms = platforms.linux;
     license = licenses.gpl2;
diff --git a/pkgs/applications/science/electronics/pulseview/default.nix b/pkgs/applications/science/electronics/pulseview/default.nix
index ae9afd95518..f43717389b5 100644
--- a/pkgs/applications/science/electronics/pulseview/default.nix
+++ b/pkgs/applications/science/electronics/pulseview/default.nix
@@ -22,7 +22,7 @@ mkDerivation rec {
 
   meta = with lib; {
     description = "Qt-based LA/scope/MSO GUI for sigrok (a signal analysis software suite)";
-    homepage = https://sigrok.org/;
+    homepage = "https://sigrok.org/";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ bjornfor ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/electronics/qfsm/default.nix b/pkgs/applications/science/electronics/qfsm/default.nix
index 6ca3f80cefd..9b6e75c77ba 100644
--- a/pkgs/applications/science/electronics/qfsm/default.nix
+++ b/pkgs/applications/science/electronics/qfsm/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Graphical editor for finite state machines";
-    homepage = http://qfsm.sourceforge.net/;
+    homepage = "http://qfsm.sourceforge.net/";
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = stdenv.lib.platforms.unix;
   };
diff --git a/pkgs/applications/science/electronics/qucs/default.nix b/pkgs/applications/science/electronics/qucs/default.nix
index 1bfe6df5ff5..62a9ae8b73b 100644
--- a/pkgs/applications/science/electronics/qucs/default.nix
+++ b/pkgs/applications/science/electronics/qucs/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Integrated circuit simulator";
-    homepage = http://qucs.sourceforge.net;
+    homepage = "http://qucs.sourceforge.net";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/electronics/tkgate/1.x.nix b/pkgs/applications/science/electronics/tkgate/1.x.nix
index 2c346b0e74a..e6f91261603 100644
--- a/pkgs/applications/science/electronics/tkgate/1.x.nix
+++ b/pkgs/applications/science/electronics/tkgate/1.x.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Event driven digital circuit simulator with a TCL/TK-based graphical editor";
-    homepage = http://www.tkgate.org/;
+    homepage = "http://www.tkgate.org/";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.peti ];
     hydraPlatforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/electronics/verilog/default.nix b/pkgs/applications/science/electronics/verilog/default.nix
index b707db14160..fa1efe29982 100644
--- a/pkgs/applications/science/electronics/verilog/default.nix
+++ b/pkgs/applications/science/electronics/verilog/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Icarus Verilog compiler";
-    repositories.git = https://github.com/steveicarus/iverilog.git;
+    repositories.git = "https://github.com/steveicarus/iverilog.git";
     homepage = "http://iverilog.icarus.com/";
     license = licenses.lgpl21;
     maintainers = with maintainers; [ winden ];
diff --git a/pkgs/applications/science/electronics/xcircuit/default.nix b/pkgs/applications/science/electronics/xcircuit/default.nix
index d10b486492e..52fe9b03741 100644
--- a/pkgs/applications/science/electronics/xcircuit/default.nix
+++ b/pkgs/applications/science/electronics/xcircuit/default.nix
@@ -27,7 +27,7 @@ in stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Generic drawing program tailored to circuit diagrams";
-    homepage = http://opencircuitdesign.com/xcircuit;
+    homepage = "http://opencircuitdesign.com/xcircuit";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ spacefrogg thoughtpolice ];
diff --git a/pkgs/applications/science/electronics/xoscope/default.nix b/pkgs/applications/science/electronics/xoscope/default.nix
index 829caacb55c..f8a68f31f46 100644
--- a/pkgs/applications/science/electronics/xoscope/default.nix
+++ b/pkgs/applications/science/electronics/xoscope/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Oscilloscope through the sound card";
-    homepage = http://xoscope.sourceforge.net;
+    homepage = "http://xoscope.sourceforge.net";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/geometry/drgeo/default.nix b/pkgs/applications/science/geometry/drgeo/default.nix
index e8ae4d01a6d..7bae3d414cb 100644
--- a/pkgs/applications/science/geometry/drgeo/default.nix
+++ b/pkgs/applications/science/geometry/drgeo/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Interactive geometry program";
-    homepage = https://sourceforge.net/projects/ofset;
+    homepage = "https://sourceforge.net/projects/ofset";
     license = licenses.gpl2;
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/science/geometry/tetgen/1.4.nix b/pkgs/applications/science/geometry/tetgen/1.4.nix
index 3a2dbf180ee..9dd25473683 100644
--- a/pkgs/applications/science/geometry/tetgen/1.4.nix
+++ b/pkgs/applications/science/geometry/tetgen/1.4.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator";
-    homepage = http://tetgen.org/;
+    homepage = "http://tetgen.org/";
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/applications/science/geometry/tetgen/default.nix b/pkgs/applications/science/geometry/tetgen/default.nix
index 0d3a7cc2bc2..d12e8e35844 100644
--- a/pkgs/applications/science/geometry/tetgen/default.nix
+++ b/pkgs/applications/science/geometry/tetgen/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
   meta = {
     inherit version;
     description = "Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator";
-    homepage = http://tetgen.org/;
+    homepage = "http://tetgen.org/";
     license = stdenv.lib.licenses.agpl3Plus;
     platforms = stdenv.lib.platforms.linux;
   };
diff --git a/pkgs/applications/science/logic/abella/default.nix b/pkgs/applications/science/logic/abella/default.nix
index 7078fd454a0..3d9a2e9bd67 100644
--- a/pkgs/applications/science/logic/abella/default.nix
+++ b/pkgs/applications/science/logic/abella/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
       of programming languages and other logical systems which manipulate
       objects with binding.
     '';
-    homepage = http://abella-prover.org/;
+    homepage = "http://abella-prover.org/";
     license = stdenv.lib.licenses.gpl3;
     maintainers = with stdenv.lib.maintainers; [ bcdarwin ciil ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/acgtk/default.nix b/pkgs/applications/science/logic/acgtk/default.nix
index b7dc9571247..ccd08000507 100644
--- a/pkgs/applications/science/logic/acgtk/default.nix
+++ b/pkgs/applications/science/logic/acgtk/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
   version = "1.5.1";
 
   src = fetchurl {
-    url = https://acg.loria.fr/software/acg-1.5.1-20191113.tar.gz;
+    url = "https://acg.loria.fr/software/acg-1.5.1-20191113.tar.gz";
     sha256 = "17595qfwhzz5q091ak6i6bg5wlppbn8zfn58x3hmmmjvx2yfajn1";
   };
 
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   inherit (dune) installPhase;
 
   meta = with stdenv.lib; {
-    homepage = https://acg.loria.fr/;
+    homepage = "https://acg.loria.fr/";
     description = "A toolkit for developing ACG signatures and lexicon";
     license = licenses.cecill20;
     inherit (ocamlPackages.ocaml.meta) platforms;
diff --git a/pkgs/applications/science/logic/aiger/default.nix b/pkgs/applications/science/logic/aiger/default.nix
index 0f65c9b7eae..aa5a59ed298 100644
--- a/pkgs/applications/science/logic/aiger/default.nix
+++ b/pkgs/applications/science/logic/aiger/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "And-Inverter Graph (AIG) utilities";
-    homepage    = http://fmv.jku.at/aiger/;
+    homepage    = "http://fmv.jku.at/aiger/";
     license     = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice ];
     platforms   = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/aspino/default.nix b/pkgs/applications/science/logic/aspino/default.nix
index 82458d7c566..c1cf9034c02 100644
--- a/pkgs/applications/science/logic/aspino/default.nix
+++ b/pkgs/applications/science/logic/aspino/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ gebner ];
     platforms = platforms.unix;
     license = licenses.asl20;
-    homepage = https://alviano.net/software/maxino/;
+    homepage = "https://alviano.net/software/maxino/";
     # See pkgs/applications/science/logic/glucose/default.nix
     badPlatforms = [ "aarch64-linux" ];
   };
diff --git a/pkgs/applications/science/logic/avy/default.nix b/pkgs/applications/science/logic/avy/default.nix
index b43e0c6fbf1..78ed641a809 100644
--- a/pkgs/applications/science/logic/avy/default.nix
+++ b/pkgs/applications/science/logic/avy/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "AIGER model checking for Property Directed Reachability";
-    homepage    = https://arieg.bitbucket.io/avy/;
+    homepage    = "https://arieg.bitbucket.io/avy/";
     license     = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ thoughtpolice ];
     platforms   = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/logic/beluga/default.nix b/pkgs/applications/science/logic/beluga/default.nix
index da0e9bf1c1d..55cee9b7e17 100644
--- a/pkgs/applications/science/logic/beluga/default.nix
+++ b/pkgs/applications/science/logic/beluga/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "A functional language for reasoning about formal systems";
-    homepage    = http://complogic.cs.mcgill.ca/beluga/;
+    homepage    = "http://complogic.cs.mcgill.ca/beluga/";
     license     = stdenv.lib.licenses.gpl3Plus;
     maintainers = [ stdenv.lib.maintainers.bcdarwin ];
     platforms   = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/boolector/default.nix b/pkgs/applications/science/logic/boolector/default.nix
index 4cf0b0f1ea1..105e911ed4f 100644
--- a/pkgs/applications/science/logic/boolector/default.nix
+++ b/pkgs/applications/science/logic/boolector/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An extremely fast SMT solver for bit-vectors and arrays";
-    homepage    = https://boolector.github.io;
+    homepage    = "https://boolector.github.io";
     license     = licenses.mit;
     platforms   = platforms.linux;
     maintainers = with maintainers; [ thoughtpolice ];
diff --git a/pkgs/applications/science/logic/cedille/default.nix b/pkgs/applications/science/logic/cedille/default.nix
index 4cef49788c0..2ac96df66a6 100644
--- a/pkgs/applications/science/logic/cedille/default.nix
+++ b/pkgs/applications/science/logic/cedille/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An interactive theorem-prover and dependently typed programming language, based on extrinsic (aka Curry-style) type theory";
-    homepage = https://cedille.github.io/;
+    homepage = "https://cedille.github.io/";
     license = licenses.mit;
     maintainers = with maintainers; [ marsam mpickering ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/logic/celf/default.nix b/pkgs/applications/science/logic/celf/default.nix
index 708270f772f..9dc20a61a4d 100644
--- a/pkgs/applications/science/logic/celf/default.nix
+++ b/pkgs/applications/science/logic/celf/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Linear logic programming system";
-    homepage = https://github.com/clf/celf;
+    homepage = "https://github.com/clf/celf";
     license = licenses.gpl3;
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/logic/clprover/clprover.nix b/pkgs/applications/science/logic/clprover/clprover.nix
index 0319069660e..e53bbe68837 100644
--- a/pkgs/applications/science/logic/clprover/clprover.nix
+++ b/pkgs/applications/science/logic/clprover/clprover.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Resolution-based theorem prover for Coalition Logic implemented in C++";
-    homepage = http://cgi.csc.liv.ac.uk/~ullrich/CLProver++/;
+    homepage = "http://cgi.csc.liv.ac.uk/~ullrich/CLProver++/";
     license = licenses.gpl3; # Note that while the website states that it is GPLv2 but the file in the zip as well as the comments in the source state it is GPLv3
     maintainers = with maintainers; [ mgttlinger ];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/logic/coq/default.nix b/pkgs/applications/science/logic/coq/default.nix
index 52a587ccb48..315900d42b9 100644
--- a/pkgs/applications/science/logic/coq/default.nix
+++ b/pkgs/applications/science/logic/coq/default.nix
@@ -161,7 +161,7 @@ self = stdenv.mkDerivation {
       together with an environment for semi-interactive development of
       machine-checked proofs.
     '';
-    homepage = http://coq.inria.fr;
+    homepage = "http://coq.inria.fr";
     license = licenses.lgpl21;
     branch = coq-version;
     maintainers = with maintainers; [ roconnor thoughtpolice vbgl Zimmi48 ];
diff --git a/pkgs/applications/science/logic/coq2html/default.nix b/pkgs/applications/science/logic/coq2html/default.nix
index bebf81b030d..2e56eda893e 100644
--- a/pkgs/applications/science/logic/coq2html/default.nix
+++ b/pkgs/applications/science/logic/coq2html/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
       initially hidden, but can be revealed one by one by clicking on the
       "Proof" keyword.
     '';
-    homepage = https://github.com/xavierleroy/coq2html;
+    homepage = "https://github.com/xavierleroy/coq2html";
     license = licenses.gpl2;
     maintainers = with maintainers; [ jwiegley ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/logic/cryptominisat/default.nix b/pkgs/applications/science/logic/cryptominisat/default.nix
index b4c4cb7c047..113c6307c40 100644
--- a/pkgs/applications/science/logic/cryptominisat/default.nix
+++ b/pkgs/applications/science/logic/cryptominisat/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An advanced SAT Solver";
-    homepage    = https://github.com/msoos/cryptominisat;
+    homepage    = "https://github.com/msoos/cryptominisat";
     license     = licenses.mit;
     maintainers = with maintainers; [ mic92 ];
     platforms   = platforms.unix;
diff --git a/pkgs/applications/science/logic/cubicle/default.nix b/pkgs/applications/science/logic/cubicle/default.nix
index d198de41f9b..bfb6a57fb33 100644
--- a/pkgs/applications/science/logic/cubicle/default.nix
+++ b/pkgs/applications/science/logic/cubicle/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An open source model checker for verifying safety properties of array-based systems";
-    homepage = http://cubicle.lri.fr/;
+    homepage = "http://cubicle.lri.fr/";
     license = licenses.asl20;
     platforms = platforms.unix;
     maintainers = with maintainers; [ dwarfmaster ];
diff --git a/pkgs/applications/science/logic/cvc3/default.nix b/pkgs/applications/science/logic/cvc3/default.nix
index dfb04ad90e9..ff481fd7ab4 100644
--- a/pkgs/applications/science/logic/cvc3/default.nix
+++ b/pkgs/applications/science/logic/cvc3/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
       [ raskin ];
     platforms = platforms.linux;
     license = licenses.free;
-    homepage = http://www.cs.nyu.edu/acsys/cvc3/index.html;
+    homepage = "http://www.cs.nyu.edu/acsys/cvc3/index.html";
   };
   passthru = {
     updateInfo = {
diff --git a/pkgs/applications/science/logic/cvc4/default.nix b/pkgs/applications/science/logic/cvc4/default.nix
index c0c7a53ebd4..a6e9bc69a12 100644
--- a/pkgs/applications/science/logic/cvc4/default.nix
+++ b/pkgs/applications/science/logic/cvc4/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A high-performance theorem prover and SMT solver";
-    homepage    = http://cvc4.cs.stanford.edu/web/;
+    homepage    = "http://cvc4.cs.stanford.edu/web/";
     license     = licenses.gpl3;
     platforms   = platforms.unix;
     maintainers = with maintainers; [ vbgl thoughtpolice gebner ];
diff --git a/pkgs/applications/science/logic/drat-trim/default.nix b/pkgs/applications/science/logic/drat-trim/default.nix
index 4c4ea0f14ce..4099236e628 100644
--- a/pkgs/applications/science/logic/drat-trim/default.nix
+++ b/pkgs/applications/science/logic/drat-trim/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
       competing SAT solvers' work when they claim that a SAT instance
       is unsatisfiable.
     '';
-    homepage = https://www.cs.utexas.edu/~marijn/drat-trim/;
+    homepage = "https://www.cs.utexas.edu/~marijn/drat-trim/";
     license = licenses.mit;
     maintainers = with maintainers; [ kini ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/logic/eprover/default.nix b/pkgs/applications/science/logic/eprover/default.nix
index 1b021f71607..f19d7e35c3e 100644
--- a/pkgs/applications/science/logic/eprover/default.nix
+++ b/pkgs/applications/science/logic/eprover/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Automated theorem prover for full first-order logic with equality";
-    homepage = http://www.eprover.org/;
+    homepage = "http://www.eprover.org/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ raskin gebner ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/logic/gappa/default.nix b/pkgs/applications/science/logic/gappa/default.nix
index 7522eb4790e..2ca1bcd3098 100644
--- a/pkgs/applications/science/logic/gappa/default.nix
+++ b/pkgs/applications/science/logic/gappa/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "gappa-1.3.5";
 
   src = fetchurl {
-    url = https://gforge.inria.fr/frs/download.php/file/38044/gappa-1.3.5.tar.gz;
+    url = "https://gforge.inria.fr/frs/download.php/file/38044/gappa-1.3.5.tar.gz";
     sha256 = "0q1wdiwqj6fsbifaayb1zkp20bz8a1my81sqjsail577jmzwi07w";
   };
 
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   installPhase = "./remake install";
 
   meta = {
-    homepage = http://gappa.gforge.inria.fr/;
+    homepage = "http://gappa.gforge.inria.fr/";
     description = "Verifying and formally proving properties on numerical programs dealing with floating-point or fixed-point arithmetic";
     license = with stdenv.lib.licenses; [ cecill20 gpl2 ];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
diff --git a/pkgs/applications/science/logic/hol/default.nix b/pkgs/applications/science/logic/hol/default.nix
index d6a1eb6cbf7..dbafee7d600 100644
--- a/pkgs/applications/science/logic/hol/default.nix
+++ b/pkgs/applications/science/logic/hol/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation {
       implementing combinations of deduction, execution and property
       checking.
     '';
-    homepage = http://hol.sourceforge.net/;
+    homepage = "http://hol.sourceforge.net/";
     license = licenses.bsd3;
     maintainers = with maintainers; [ mudri ];
     platforms = with platforms; linux;
diff --git a/pkgs/applications/science/logic/hol_light/default.nix b/pkgs/applications/science/logic/hol_light/default.nix
index 69ffb87e767..9c3030517e3 100644
--- a/pkgs/applications/science/logic/hol_light/default.nix
+++ b/pkgs/applications/science/logic/hol_light/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   };
 
   patches = [(fetchpatch {
-    url = https://salsa.debian.org/ocaml-team/hol-light/-/raw/master/debian/patches/0004-Fix-compilation-with-camlp5-7.11.patch;
+    url = "https://salsa.debian.org/ocaml-team/hol-light/-/raw/master/debian/patches/0004-Fix-compilation-with-camlp5-7.11.patch";
     sha256 = "180qmxbrk3vb1ix7j77hcs8vsar91rs11s5mm8ir5352rz7ylicr";
   })];
 
@@ -47,7 +47,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Interactive theorem prover based on Higher-Order Logic";
-    homepage    = http://www.cl.cam.ac.uk/~jrh13/hol-light/;
+    homepage    = "http://www.cl.cam.ac.uk/~jrh13/hol-light/";
     license     = licenses.bsd2;
     platforms   = platforms.unix;
     maintainers = with maintainers; [ thoughtpolice maggesi vbgl ];
diff --git a/pkgs/applications/science/logic/iprover/default.nix b/pkgs/applications/science/logic/iprover/default.nix
index c4eb22a7c03..310a95d7e7a 100644
--- a/pkgs/applications/science/logic/iprover/default.nix
+++ b/pkgs/applications/science/logic/iprover/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An automated first-order logic theorem prover";
-    homepage = http://www.cs.man.ac.uk/~korovink/iprover/;
+    homepage = "http://www.cs.man.ac.uk/~korovink/iprover/";
     maintainers = with maintainers; [ raskin gebner ];
     platforms = platforms.linux;
     license = licenses.gpl3;
diff --git a/pkgs/applications/science/logic/isabelle/default.nix b/pkgs/applications/science/logic/isabelle/default.nix
index 024f2f4e829..d2e49d81783 100644
--- a/pkgs/applications/science/logic/isabelle/default.nix
+++ b/pkgs/applications/science/logic/isabelle/default.nix
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
       to be expressed in a formal language and provides tools for proving those
       formulas in a logical calculus.
     '';
-    homepage = http://isabelle.in.tum.de/;
+    homepage = "http://isabelle.in.tum.de/";
     license = "LGPL";
     maintainers = [ stdenv.lib.maintainers.jwiegley ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/logic/jonprl/default.nix b/pkgs/applications/science/logic/jonprl/default.nix
index e503836098f..3ee05a478bc 100644
--- a/pkgs/applications/science/logic/jonprl/default.nix
+++ b/pkgs/applications/science/logic/jonprl/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
       based on Brouwer-realizability & meaning explanations.
       Inspired by Nuprl
     '';
-    homepage = https://github.com/jonsterling/JonPRL;
+    homepage = "https://github.com/jonsterling/JonPRL";
     license = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ puffnfresh ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/logic/leo2/default.nix b/pkgs/applications/science/logic/leo2/default.nix
index b50848a1820..b43bfb80135 100644
--- a/pkgs/applications/science/logic/leo2/default.nix
+++ b/pkgs/applications/science/logic/leo2/default.nix
@@ -32,6 +32,6 @@ stdenv.mkDerivation rec {
     maintainers = [ maintainers.raskin ];
     platforms = platforms.linux;
     license = licenses.bsd3;
-    homepage = http://www.leoprover.org/;
+    homepage = "http://www.leoprover.org/";
   };
 }
diff --git a/pkgs/applications/science/logic/lingeling/default.nix b/pkgs/applications/science/logic/lingeling/default.nix
index 94be89d4736..1805f6cdcc8 100644
--- a/pkgs/applications/science/logic/lingeling/default.nix
+++ b/pkgs/applications/science/logic/lingeling/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Fast SAT solver";
-    homepage    = http://fmv.jku.at/lingeling/;
+    homepage    = "http://fmv.jku.at/lingeling/";
     license     = licenses.mit;
     platforms   = platforms.unix;
     maintainers = with maintainers; [ thoughtpolice ];
diff --git a/pkgs/applications/science/logic/logisim/default.nix b/pkgs/applications/science/logic/logisim/default.nix
index d6a1207b5d6..ce86b252311 100644
--- a/pkgs/applications/science/logic/logisim/default.nix
+++ b/pkgs/applications/science/logic/logisim/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   '';
   
   meta = {
-    homepage = http://ozark.hendrix.edu/~burch/logisim;
+    homepage = "http://ozark.hendrix.edu/~burch/logisim";
     description = "Educational tool for designing and simulating digital logic circuits";
     license = stdenv.lib.licenses.gpl2Plus;
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/mcrl2/default.nix b/pkgs/applications/science/logic/mcrl2/default.nix
index a479e31e339..eb83eaf79c5 100644
--- a/pkgs/applications/science/logic/mcrl2/default.nix
+++ b/pkgs/applications/science/logic/mcrl2/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
       that can be used for modelling, validation and verification of
       concurrent systems and protocols
     '';
-    homepage = https://www.mcrl2.org/;
+    homepage = "https://www.mcrl2.org/";
     license = licenses.boost;
     maintainers = with maintainers; [ moretea ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/logic/metis-prover/default.nix b/pkgs/applications/science/logic/metis-prover/default.nix
index ed1218c401b..5755abfd907 100644
--- a/pkgs/applications/science/logic/metis-prover/default.nix
+++ b/pkgs/applications/science/logic/metis-prover/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "Automatic theorem prover for first-order logic with equality";
-    homepage = http://www.gilith.com/research/metis/;
+    homepage = "http://www.gilith.com/research/metis/";
     license = licenses.mit;
     maintainers = with maintainers; [ gebner ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/logic/minisat/default.nix b/pkgs/applications/science/logic/minisat/default.nix
index 6b642832b83..df1800e6c31 100644
--- a/pkgs/applications/science/logic/minisat/default.nix
+++ b/pkgs/applications/science/logic/minisat/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ gebner raskin ];
     platforms = platforms.unix;
     license = licenses.mit;
-    homepage = http://minisat.se/;
+    homepage = "http://minisat.se/";
   };
 }
diff --git a/pkgs/applications/science/logic/monosat/default.nix b/pkgs/applications/science/logic/monosat/default.nix
index ba0e787af72..63440213920 100644
--- a/pkgs/applications/science/logic/monosat/default.nix
+++ b/pkgs/applications/science/logic/monosat/default.nix
@@ -23,7 +23,7 @@ let
   patches = [
     # Python 3.8 compatibility
     (fetchpatch {
-      url = https://github.com/sambayless/monosat/commit/a5079711d0df0451f9840f3a41248e56dbb03967.patch;
+      url = "https://github.com/sambayless/monosat/commit/a5079711d0df0451f9840f3a41248e56dbb03967.patch";
       sha256 = "1p2y0jw8hb9c90nbffhn86k1dxd6f6hk5v70dfmpzka3y6g1ksal";
     })
   ];
@@ -50,7 +50,7 @@ let
       description = "SMT solver for Monotonic Theories";
       platforms   = platforms.unix;
       license     = if includeGplCode then licenses.gpl2 else licenses.mit;
-      homepage    = https://github.com/sambayless/monosat;
+      homepage    = "https://github.com/sambayless/monosat";
       maintainers = [ maintainers.acairncross ];
     };
   };
diff --git a/pkgs/applications/science/logic/open-wbo/default.nix b/pkgs/applications/science/logic/open-wbo/default.nix
index 32ce9fde0c3..c314127e74b 100644
--- a/pkgs/applications/science/logic/open-wbo/default.nix
+++ b/pkgs/applications/science/logic/open-wbo/default.nix
@@ -22,6 +22,6 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ gebner ];
     platforms = platforms.unix;
     license = licenses.mit;
-    homepage = http://sat.inesc-id.pt/open-wbo/;
+    homepage = "http://sat.inesc-id.pt/open-wbo/";
   };
 }
diff --git a/pkgs/applications/science/logic/opensmt/default.nix b/pkgs/applications/science/logic/opensmt/default.nix
index 9e5ebe008b8..03b3ce4ff0b 100644
--- a/pkgs/applications/science/logic/opensmt/default.nix
+++ b/pkgs/applications/science/logic/opensmt/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     maintainers = [ maintainers.raskin ];
     platforms = platforms.linux;
     license = licenses.gpl3;
-    homepage = http://code.google.com/p/opensmt/;
+    homepage = "http://code.google.com/p/opensmt/";
     broken = true;
     downloadPage = "http://code.google.com/p/opensmt/downloads/list";
   };
diff --git a/pkgs/applications/science/logic/ott/default.nix b/pkgs/applications/science/logic/ott/default.nix
index fa7c3dd5e95..fa2ad9c4abc 100644
--- a/pkgs/applications/science/logic/ott/default.nix
+++ b/pkgs/applications/science/logic/ott/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
       terms of the defined language, parsing them and replacing them by
       target-system terms.
     '';
-    homepage = http://www.cl.cam.ac.uk/~pes20/ott;
+    homepage = "http://www.cl.cam.ac.uk/~pes20/ott";
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ jwiegley ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/picosat/default.nix b/pkgs/applications/science/logic/picosat/default.nix
index 547bd31e8b4..b13d871580c 100644
--- a/pkgs/applications/science/logic/picosat/default.nix
+++ b/pkgs/applications/science/logic/picosat/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "SAT solver with proof and core support";
-    homepage    = http://fmv.jku.at/picosat/;
+    homepage    = "http://fmv.jku.at/picosat/";
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.unix;
     maintainers = with stdenv.lib.maintainers; [ roconnor thoughtpolice ];
diff --git a/pkgs/applications/science/logic/prooftree/default.nix b/pkgs/applications/science/logic/prooftree/default.nix
index d4feb5c9e28..98313e48cb2 100644
--- a/pkgs/applications/science/logic/prooftree/default.nix
+++ b/pkgs/applications/science/logic/prooftree/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
       below the tree (on single click) or in a separate window (on double or
       shift-click).
     '';
-    homepage = http://askra.de/software/prooftree;
+    homepage = "http://askra.de/software/prooftree";
     platforms = platforms.unix;
     maintainers = [ maintainers.jwiegley ];
     license = licenses.gpl3;
diff --git a/pkgs/applications/science/logic/prover9/default.nix b/pkgs/applications/science/logic/prover9/default.nix
index 9528a5942a4..fcdff855848 100644
--- a/pkgs/applications/science/logic/prover9/default.nix
+++ b/pkgs/applications/science/logic/prover9/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "prover9-2009-11a";
 
   src = fetchurl {
-    url = https://www.cs.unm.edu/~mccune/mace4/download/LADR-2009-11A.tar.gz;
+    url = "https://www.cs.unm.edu/~mccune/mace4/download/LADR-2009-11A.tar.gz";
     sha256 = "1l2i3d3h5z7nnbzilb6z92r0rbx0kh6yaxn2c5qhn3000xcfsay3";
   };
 
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = https://www.cs.unm.edu/~mccune/mace4/;
+    homepage = "https://www.cs.unm.edu/~mccune/mace4/";
     license = "GPL";
     description = "Automated theorem prover for first-order and equational logic";
     longDescription = ''
diff --git a/pkgs/applications/science/logic/redprl/default.nix b/pkgs/applications/science/logic/redprl/default.nix
index 9da2647d113..49245c73f2c 100644
--- a/pkgs/applications/science/logic/redprl/default.nix
+++ b/pkgs/applications/science/logic/redprl/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   '';
   meta = {
     description = "A proof assistant for Nominal Computational Type Theory";
-    homepage = http://www.redprl.org/;
+    homepage = "http://www.redprl.org/";
     license = stdenv.lib.licenses.mit;
     maintainers = [ stdenv.lib.maintainers.acowley ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/sad/default.nix b/pkgs/applications/science/logic/sad/default.nix
index 8e94356f376..f9b82b5d733 100644
--- a/pkgs/applications/science/logic/sad/default.nix
+++ b/pkgs/applications/science/logic/sad/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
       '';
     license = stdenv.lib.licenses.gpl3Plus;
     maintainers = [ stdenv.lib.maintainers.schmitthenner ];
-    homepage = http://nevidal.org/sad.en.html;
+    homepage = "http://nevidal.org/sad.en.html";
     platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/applications/science/logic/satallax/default.nix b/pkgs/applications/science/logic/satallax/default.nix
index d3ceeadbf9a..6c2b03b5b37 100644
--- a/pkgs/applications/science/logic/satallax/default.nix
+++ b/pkgs/applications/science/logic/satallax/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.linux;
     downloadPage = "http://www.ps.uni-saarland.de/~cebrown/satallax/downloads.php";
-    homepage = http://www.ps.uni-saarland.de/~cebrown/satallax/index.php;
+    homepage = "http://www.ps.uni-saarland.de/~cebrown/satallax/index.php";
     updateWalker = true;
   };
 }
diff --git a/pkgs/applications/science/logic/tamarin-prover/default.nix b/pkgs/applications/science/logic/tamarin-prover/default.nix
index 9b87b8c899e..857aba5a260 100644
--- a/pkgs/applications/science/logic/tamarin-prover/default.nix
+++ b/pkgs/applications/science/logic/tamarin-prover/default.nix
@@ -18,7 +18,7 @@ let
     inherit pname version src;
 
     license     = lib.licenses.gpl3;
-    homepage    = https://tamarin-prover.github.io;
+    homepage    = "https://tamarin-prover.github.io";
     description = "Security protocol verification in the symbolic model";
     maintainers = [ lib.maintainers.thoughtpolice ];
   };
diff --git a/pkgs/applications/science/logic/tlaplus/default.nix b/pkgs/applications/science/logic/tlaplus/default.nix
index b1c72d7c5ee..3476b5ea9d9 100644
--- a/pkgs/applications/science/logic/tlaplus/default.nix
+++ b/pkgs/applications/science/logic/tlaplus/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "An algorithm specification language with model checking tools";
-    homepage    = http://lamport.azurewebsites.net/tla/tla.html;
+    homepage    = "http://lamport.azurewebsites.net/tla/tla.html";
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.unix;
     maintainers = [ stdenv.lib.maintainers.thoughtpolice ];
diff --git a/pkgs/applications/science/logic/tlaplus/tlaps.nix b/pkgs/applications/science/logic/tlaplus/tlaps.nix
index 7c8389688d9..cbca37ea53d 100644
--- a/pkgs/applications/science/logic/tlaplus/tlaps.nix
+++ b/pkgs/applications/science/logic/tlaplus/tlaps.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
       and scalable to large system specifications. It provides a
       consistent abstraction over the various “backend” verifiers.
     '';
-    homepage    = https://tla.msr-inria.inria.fr/tlaps/content/Home.html;
+    homepage    = "https://tla.msr-inria.inria.fr/tlaps/content/Home.html";
     license     = stdenv.lib.licenses.bsd2;
     platforms   = stdenv.lib.platforms.unix;
     maintainers = [ stdenv.lib.maintainers.badi ];
diff --git a/pkgs/applications/science/logic/tlaplus/toolbox.nix b/pkgs/applications/science/logic/tlaplus/toolbox.nix
index 91666e85d92..f326d62f8f0 100644
--- a/pkgs/applications/science/logic/tlaplus/toolbox.nix
+++ b/pkgs/applications/science/logic/tlaplus/toolbox.nix
@@ -66,7 +66,7 @@ in stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = http://research.microsoft.com/en-us/um/people/lamport/tla/toolbox.html;
+    homepage = "http://research.microsoft.com/en-us/um/people/lamport/tla/toolbox.html";
     description = "IDE for the TLA+ tools";
     longDescription = ''
       Integrated development environment for the TLA+ tools, based on Eclipse. You can use it
diff --git a/pkgs/applications/science/logic/twelf/default.nix b/pkgs/applications/science/logic/twelf/default.nix
index 161da6e4b23..975b989bd94 100644
--- a/pkgs/applications/science/logic/twelf/default.nix
+++ b/pkgs/applications/science/logic/twelf/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
       a foundational proof-carrying-code system, and a type safety proof for
       Standard ML.
     '';
-    homepage = http://twelf.org/wiki/Main_Page;
+    homepage = "http://twelf.org/wiki/Main_Page";
     license = stdenv.lib.licenses.mit;
     maintainers = with stdenv.lib.maintainers; [ jwiegley ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/applications/science/logic/vampire/default.nix b/pkgs/applications/science/logic/vampire/default.nix
index 42963fe5f9c..e5941a35fd5 100644
--- a/pkgs/applications/science/logic/vampire/default.nix
+++ b/pkgs/applications/science/logic/vampire/default.nix
@@ -19,19 +19,19 @@ stdenv.mkDerivation rec {
     # https://github.com/vprover/vampire/pull/54
     (fetchpatch {
       name = "fix-apple-cygwin-defines.patch";
-      url = https://github.com/vprover/vampire/pull/54.patch;
+      url = "https://github.com/vprover/vampire/pull/54.patch";
       sha256 = "0i6nrc50wlg1dqxq38lkpx4rmfb3lf7s8f95l4jkvqp0nxa20cza";
     })
     # https://github.com/vprover/vampire/pull/55
     (fetchpatch {
       name = "fix-wait-any.patch";
-      url = https://github.com/vprover/vampire/pull/55.patch;
+      url = "https://github.com/vprover/vampire/pull/55.patch";
       sha256 = "1pwfpwpl23bqsgkmmvw6bnniyvp5j9v8l3z9s9pllfabnfcrcz9l";
     })
     # https://github.com/vprover/vampire/pull/56
     (fetchpatch {
       name = "fenv.patch";
-      url = https://github.com/vprover/vampire/pull/56.patch;
+      url = "https://github.com/vprover/vampire/pull/56.patch";
       sha256 = "0xl3jcyqmk146mg3qj5hdd0pbja6wbq3250zmfhbxqrjh40mm40g";
     })
   ];
diff --git a/pkgs/applications/science/logic/verit/default.nix b/pkgs/applications/science/logic/verit/default.nix
index 2c68191b800..f20a8324157 100644
--- a/pkgs/applications/science/logic/verit/default.nix
+++ b/pkgs/applications/science/logic/verit/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "An open, trustable and efficient SMT-solver";
-    homepage = http://www.verit-solver.org/;
+    homepage = "http://www.verit-solver.org/";
     license = licenses.bsd3;
     platforms = platforms.unix;
     maintainers = [ maintainers.gebner ];
diff --git a/pkgs/applications/science/logic/why3/default.nix b/pkgs/applications/science/logic/why3/default.nix
index e5764461819..51cb2a456c1 100644
--- a/pkgs/applications/science/logic/why3/default.nix
+++ b/pkgs/applications/science/logic/why3/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
   version = "1.2.1";
 
   src = fetchurl {
-    url = https://gforge.inria.fr/frs/download.php/file/38185/why3-1.2.1.tar.gz;
+    url = "https://gforge.inria.fr/frs/download.php/file/38185/why3-1.2.1.tar.gz";
     sha256 = "014gkwisjp05x3342zxkryb729p02ngx1hcjjsrplpa53jzgz647";
   };
 
diff --git a/pkgs/applications/science/machine-learning/fasttext/default.nix b/pkgs/applications/science/machine-learning/fasttext/default.nix
index 0de54572862..2ae5e0eeddc 100644
--- a/pkgs/applications/science/machine-learning/fasttext/default.nix
+++ b/pkgs/applications/science/machine-learning/fasttext/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Library for text classification and representation learning";
-    homepage = https://fasttext.cc/;
+    homepage = "https://fasttext.cc/";
     license = licenses.mit;
     platforms = platforms.unix;
     maintainers = [ maintainers.danieldk ];
diff --git a/pkgs/applications/science/machine-learning/labelimg/default.nix b/pkgs/applications/science/machine-learning/labelimg/default.nix
index b1c89d29950..a952fb559ce 100644
--- a/pkgs/applications/science/machine-learning/labelimg/default.nix
+++ b/pkgs/applications/science/machine-learning/labelimg/default.nix
@@ -18,7 +18,7 @@
     '';
     meta = with stdenv.lib; {
       description = "LabelImg is a graphical image annotation tool and label object bounding boxes in images";
-      homepage = https://github.com/tzutalin/labelImg;
+      homepage = "https://github.com/tzutalin/labelImg";
       license = licenses.mit;
       platforms = platforms.linux;
       maintainers = [ maintainers.cmcdragonkai ];
diff --git a/pkgs/applications/science/machine-learning/streamlit/default.nix b/pkgs/applications/science/machine-learning/streamlit/default.nix
index c7bdf0f12a4..3856b8ec841 100644
--- a/pkgs/applications/science/machine-learning/streamlit/default.nix
+++ b/pkgs/applications/science/machine-learning/streamlit/default.nix
@@ -25,7 +25,7 @@ buildPythonApplication rec {
   '';
 
   meta = with lib; {
-    homepage = https://streamlit.io/;
+    homepage = "https://streamlit.io/";
     description = "The fastest way to build custom ML tools";
     maintainers = with maintainers; [ yrashk ];
     license = licenses.asl20;
diff --git a/pkgs/applications/science/math/LiE/default.nix b/pkgs/applications/science/math/LiE/default.nix
index d59ec57c1a8..f5f3bb0a42b 100644
--- a/pkgs/applications/science/math/LiE/default.nix
+++ b/pkgs/applications/science/math/LiE/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "A Computer algebra package for Lie group computations";
-    homepage = http://wwwmathlabo.univ-poitiers.fr/~maavl/LiE/;
+    homepage = "http://wwwmathlabo.univ-poitiers.fr/~maavl/LiE/";
     license = stdenv.lib.licenses.lgpl3; # see the website
 
     longDescription = ''
diff --git a/pkgs/applications/science/math/almonds/default.nix b/pkgs/applications/science/math/almonds/default.nix
index b5d9632c551..9edb0747b31 100644
--- a/pkgs/applications/science/math/almonds/default.nix
+++ b/pkgs/applications/science/math/almonds/default.nix
@@ -19,7 +19,7 @@ with python3.pkgs; buildPythonApplication rec {
 
   meta = with stdenv.lib; {
     description = "Terminal Mandelbrot fractal viewer";
-    homepage = https://github.com/Tenchi2xh/Almonds;
+    homepage = "https://github.com/Tenchi2xh/Almonds";
     license = licenses.mit;
     maintainers = with maintainers; [ infinisil ];
   };
diff --git a/pkgs/applications/science/math/bcal/default.nix b/pkgs/applications/science/math/bcal/default.nix
index 74adcab4e70..18b6e051b3f 100644
--- a/pkgs/applications/science/math/bcal/default.nix
+++ b/pkgs/applications/science/math/bcal/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Storage conversion and expression calculator";
-    homepage = https://github.com/jarun/bcal;
+    homepage = "https://github.com/jarun/bcal";
     license = licenses.gpl3;
     platforms = [ "aarch64-linux" "x86_64-darwin" "x86_64-linux" ];
     maintainers = with maintainers; [ jfrankenau ];
diff --git a/pkgs/applications/science/math/bliss/default.nix b/pkgs/applications/science/math/bliss/default.nix
index 37504fceb14..361b0884662 100644
--- a/pkgs/applications/science/math/bliss/default.nix
+++ b/pkgs/applications/science/math/bliss/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "bliss is an open source tool for computing automorphism groups and canonical forms of graphs. It has both a command line user interface as well as C++ and C programming language APIs.";
-    homepage = http://www.tcs.hut.fi/Software/bliss/;
+    homepage = "http://www.tcs.hut.fi/Software/bliss/";
     license = licenses.lgpl3;
     platforms = [ "i686-linux" "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/math/caffe/default.nix b/pkgs/applications/science/math/caffe/default.nix
index 5068abbf307..ea87c4953ee 100644
--- a/pkgs/applications/science/math/caffe/default.nix
+++ b/pkgs/applications/science/math/caffe/default.nix
@@ -134,7 +134,7 @@ stdenv.mkDerivation rec {
       modularity in mind. It is developed by the Berkeley Vision and Learning
       Center (BVLC) and by community contributors.
     '';
-    homepage = http://caffe.berkeleyvision.org/;
+    homepage = "http://caffe.berkeleyvision.org/";
     maintainers = with maintainers; [ jb55 ];
     license = licenses.bsd2;
     platforms = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/applications/science/math/calc/default.nix b/pkgs/applications/science/math/calc/default.nix
index 0d149eca3b6..8e50f48b286 100644
--- a/pkgs/applications/science/math/calc/default.nix
+++ b/pkgs/applications/science/math/calc/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "C-style arbitrary precision calculator";
-    homepage = http://www.isthe.com/chongo/tech/comp/calc/;
+    homepage = "http://www.isthe.com/chongo/tech/comp/calc/";
     license = licenses.lgpl21;
     maintainers = with maintainers; [ matthewbauer ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/math/cbc/default.nix b/pkgs/applications/science/math/cbc/default.nix
index e68ceb379b0..b75f3d3f786 100644
--- a/pkgs/applications/science/math/cbc/default.nix
+++ b/pkgs/applications/science/math/cbc/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   # FIXME: move share/coin/Data to a separate output?
 
   meta = {
-    homepage = https://projects.coin-or.org/Cbc;
+    homepage = "https://projects.coin-or.org/Cbc";
     license = lib.licenses.epl10;
     maintainers = [ lib.maintainers.eelco ];
     platforms = lib.platforms.linux ++ lib.platforms.darwin;
diff --git a/pkgs/applications/science/math/cntk/default.nix b/pkgs/applications/science/math/cntk/default.nix
index ceb87b25ba8..e2db40a402e 100644
--- a/pkgs/applications/science/math/cntk/default.nix
+++ b/pkgs/applications/science/math/cntk/default.nix
@@ -95,7 +95,7 @@ in stdenv.mkDerivation rec {
     # Newer cub is included with cudatoolkit now and it breaks the build.
     # https://github.com/Microsoft/CNTK/issues/3191
     broken = cudaSupport;
-    homepage = https://github.com/Microsoft/CNTK;
+    homepage = "https://github.com/Microsoft/CNTK";
     description = "An open source deep-learning toolkit";
     license = if onebitSGDSupport then licenses.unfreeRedistributable else licenses.mit;
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/math/csdp/default.nix b/pkgs/applications/science/math/csdp/default.nix
index 9b402fe0ac9..eef60829f8e 100644
--- a/pkgs/applications/science/math/csdp/default.nix
+++ b/pkgs/applications/science/math/csdp/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = https://projects.coin-or.org/Csdp;
+    homepage = "https://projects.coin-or.org/Csdp";
     license = lib.licenses.cpl10;
     maintainers = [ lib.maintainers.roconnor ];
     description = "A C Library for Semidefinite Programming";
diff --git a/pkgs/applications/science/math/ecm/default.nix b/pkgs/applications/science/math/ecm/default.nix
index 7b768f7077e..3e8e5879950 100644
--- a/pkgs/applications/science/math/ecm/default.nix
+++ b/pkgs/applications/science/math/ecm/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Elliptic Curve Method for Integer Factorization";
     license = stdenv.lib.licenses.gpl2Plus;
-    homepage = http://ecm.gforge.inria.fr/;
+    homepage = "http://ecm.gforge.inria.fr/";
     maintainers = [ stdenv.lib.maintainers.roconnor ];
     platforms = with stdenv.lib.platforms; linux ++ darwin;
   };
diff --git a/pkgs/applications/science/math/eukleides/default.nix b/pkgs/applications/science/math/eukleides/default.nix
index 6d1c778d1e0..879ad96a936 100644
--- a/pkgs/applications/science/math/eukleides/default.nix
+++ b/pkgs/applications/science/math/eukleides/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Geometry Drawing Language";
-    homepage = http://www.eukleides.org/;
+    homepage = "http://www.eukleides.org/";
     license = stdenv.lib.licenses.gpl2;
 
     longDescription = ''
diff --git a/pkgs/applications/science/math/form/default.nix b/pkgs/applications/science/math/form/default.nix
index 0dbafebf2c0..09137279290 100644
--- a/pkgs/applications/science/math/form/default.nix
+++ b/pkgs/applications/science/math/form/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "The FORM project for symbolic manipulation of very big expressions";
-    homepage = https://www.nikhef.nl/~form/;
+    homepage = "https://www.nikhef.nl/~form/";
     license = licenses.gpl3;
     maintainers = [ maintainers.veprbl ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/math/fricas/default.nix b/pkgs/applications/science/math/fricas/default.nix
index 7d1f738641a..39ca53c47e6 100644
--- a/pkgs/applications/science/math/fricas/default.nix
+++ b/pkgs/applications/science/math/fricas/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   dontStrip = true;
 
   meta = {
-    homepage = http://fricas.sourceforge.net/;
+    homepage = "http://fricas.sourceforge.net/";
     description = "An advanced computer algebra system";
     license = stdenv.lib.licenses.bsd3;
 
diff --git a/pkgs/applications/science/math/gap/default.nix b/pkgs/applications/science/math/gap/default.nix
index 7eb10d1f952..87f4fa12038 100644
--- a/pkgs/applications/science/math/gap/default.nix
+++ b/pkgs/applications/science/math/gap/default.nix
@@ -175,6 +175,6 @@ stdenv.mkDerivation rec {
     # is reasonable and that way the binary cache doesn't get overloaded.
     hydraPlatforms = lib.optionals (!keepAllPackages) meta.platforms;
     license = licenses.gpl2;
-    homepage = http://gap-system.org/;
+    homepage = "http://gap-system.org/";
   };
 }
diff --git a/pkgs/applications/science/math/geogebra/default.nix b/pkgs/applications/science/math/geogebra/default.nix
index bba26610a07..1dd92267a83 100644
--- a/pkgs/applications/science/math/geogebra/default.nix
+++ b/pkgs/applications/science/math/geogebra/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
       together geometry, algebra, spreadsheets, graphing, statistics and
       calculus in one easy-to-use package.
     '';
-    homepage = https://www.geogebra.org/;
+    homepage = "https://www.geogebra.org/";
     maintainers = with maintainers; [ ma27 ];
     license = with licenses; [ gpl3 cc-by-nc-sa-30 geogebra ];
     platforms = platforms.all;
diff --git a/pkgs/applications/science/math/gfan/default.nix b/pkgs/applications/science/math/gfan/default.nix
index 33b003b2b56..72d1a548c53 100644
--- a/pkgs/applications/science/math/gfan/default.nix
+++ b/pkgs/applications/science/math/gfan/default.nix
@@ -22,6 +22,6 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2 ;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
-    homepage = http://home.math.au.dk/jensen/software/gfan/gfan.html;
+    homepage = "http://home.math.au.dk/jensen/software/gfan/gfan.html";
   };
 }
diff --git a/pkgs/applications/science/math/ginac/default.nix b/pkgs/applications/science/math/ginac/default.nix
index 79f20f06b29..1e4fd6288ce 100644
--- a/pkgs/applications/science/math/ginac/default.nix
+++ b/pkgs/applications/science/math/ginac/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "GiNaC is Not a CAS";
-    homepage    = http://www.ginac.de/;
+    homepage    = "http://www.ginac.de/";
     maintainers = with maintainers; [ lovek323 ];
     license = licenses.gpl2;
     platforms   = platforms.all;
diff --git a/pkgs/applications/science/math/glsurf/default.nix b/pkgs/applications/science/math/glsurf/default.nix
index c11110e4bc4..09d0d524168 100644
--- a/pkgs/applications/science/math/glsurf/default.nix
+++ b/pkgs/applications/science/math/glsurf/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = https://raffalli.eu/~christophe/glsurf/;
+    homepage = "https://raffalli.eu/~christophe/glsurf/";
     description = "A program to draw implicit surfaces and curves";
     license = stdenv.lib.licenses.lgpl21;
   };
diff --git a/pkgs/applications/science/math/gurobi/default.nix b/pkgs/applications/science/math/gurobi/default.nix
index 4ac7c411c2d..1aa7bce07c5 100644
--- a/pkgs/applications/science/math/gurobi/default.nix
+++ b/pkgs/applications/science/math/gurobi/default.nix
@@ -50,7 +50,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Optimization solver for mathematical programming";
-    homepage = https://www.gurobi.com;
+    homepage = "https://www.gurobi.com";
     license = licenses.unfree;
     platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ jfrankenau ];
diff --git a/pkgs/applications/science/math/hmetis/default.nix b/pkgs/applications/science/math/hmetis/default.nix
index 45a13d02889..b5e99a8dd75 100644
--- a/pkgs/applications/science/math/hmetis/default.nix
+++ b/pkgs/applications/science/math/hmetis/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "hMETIS is a set of programs for partitioning hypergraphs";
-    homepage = http://glaros.dtc.umn.edu/gkhome/metis/hmetis/overview;
+    homepage = "http://glaros.dtc.umn.edu/gkhome/metis/hmetis/overview";
     license = licenses.unfree;
     platforms = [ "i686-linux" "x86_64-linux" ];
   };
diff --git a/pkgs/applications/science/math/jags/default.nix b/pkgs/applications/science/math/jags/default.nix
index 1d1fb96a473..5ac1594e19a 100644
--- a/pkgs/applications/science/math/jags/default.nix
+++ b/pkgs/applications/science/math/jags/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Just Another Gibbs Sampler";
     license     = licenses.gpl2;
-    homepage    = http://mcmc-jags.sourceforge.net;
+    homepage    = "http://mcmc-jags.sourceforge.net";
     maintainers = [ maintainers.andres ];
     platforms = platforms.unix;
   };
diff --git a/pkgs/applications/science/math/lrcalc/default.nix b/pkgs/applications/science/math/lrcalc/default.nix
index f407358d8f2..438a84c0e0b 100644
--- a/pkgs/applications/science/math/lrcalc/default.nix
+++ b/pkgs/applications/science/math/lrcalc/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Littlewood-Richardson calculator";
-    homepage = http://math.rutgers.edu/~asbuch/lrcalc/;
+    homepage = "http://math.rutgers.edu/~asbuch/lrcalc/";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ timokau ];
     platforms = platforms.unix;
diff --git a/pkgs/applications/science/math/mathematica/10.nix b/pkgs/applications/science/math/mathematica/10.nix
index 4204b139913..c7da7b16da8 100644
--- a/pkgs/applications/science/math/mathematica/10.nix
+++ b/pkgs/applications/science/math/mathematica/10.nix
@@ -130,7 +130,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Wolfram Mathematica computational software system";
-    homepage = http://www.wolfram.com/mathematica/;
+    homepage = "http://www.wolfram.com/mathematica/";
     license = stdenv.lib.licenses.unfree;
   };
 }
diff --git a/pkgs/applications/science/math/mathematica/11.nix b/pkgs/applications/science/math/mathematica/11.nix
index 521cb70099b..898d6a48635 100644
--- a/pkgs/applications/science/math/mathematica/11.nix
+++ b/pkgs/applications/science/math/mathematica/11.nix
@@ -144,7 +144,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Wolfram Mathematica computational software system";
-    homepage = http://www.wolfram.com/mathematica/;
+    homepage = "http://www.wolfram.com/mathematica/";
     license = stdenv.lib.licenses.unfree;
   };
 }
diff --git a/pkgs/applications/science/math/mathematica/9.nix b/pkgs/applications/science/math/mathematica/9.nix
index aaa1c02ec0a..617ac865713 100644
--- a/pkgs/applications/science/math/mathematica/9.nix
+++ b/pkgs/applications/science/math/mathematica/9.nix
@@ -116,7 +116,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Wolfram Mathematica computational software system";
-    homepage = http://www.wolfram.com/mathematica/;
+    homepage = "http://www.wolfram.com/mathematica/";
     license = stdenv.lib.licenses.unfree;
   };
 }
diff --git a/pkgs/applications/science/math/mathematica/default.nix b/pkgs/applications/science/math/mathematica/default.nix
index 5553bb0505f..7831640b124 100644
--- a/pkgs/applications/science/math/mathematica/default.nix
+++ b/pkgs/applications/science/math/mathematica/default.nix
@@ -148,7 +148,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Wolfram Mathematica computational software system";
-    homepage = http://www.wolfram.com/mathematica/;
+    homepage = "http://www.wolfram.com/mathematica/";
     license = licenses.unfree;
     maintainers = with maintainers; [ herberteuler ];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/math/maxima/5.41.nix b/pkgs/applications/science/math/maxima/5.41.nix
index 583391d08dd..829dffc6116 100644
--- a/pkgs/applications/science/math/maxima/5.41.nix
+++ b/pkgs/applications/science/math/maxima/5.41.nix
@@ -86,7 +86,7 @@ stdenv.mkDerivation ({
 
   meta = {
     description = "Computer algebra system";
-    homepage = http://maxima.sourceforge.net;
+    homepage = "http://maxima.sourceforge.net";
     license = stdenv.lib.licenses.gpl2;
 
     longDescription = ''
diff --git a/pkgs/applications/science/math/maxima/default.nix b/pkgs/applications/science/math/maxima/default.nix
index 5843f38a74a..49ff0d5d5a0 100644
--- a/pkgs/applications/science/math/maxima/default.nix
+++ b/pkgs/applications/science/math/maxima/default.nix
@@ -88,7 +88,7 @@ stdenv.mkDerivation ({
 
   meta = {
     description = "Computer algebra system";
-    homepage = http://maxima.sourceforge.net;
+    homepage = "http://maxima.sourceforge.net";
     license = stdenv.lib.licenses.gpl2;
 
     longDescription = ''
diff --git a/pkgs/applications/science/math/msieve/default.nix b/pkgs/applications/science/math/msieve/default.nix
index 643d990feb8..db7a1c14906 100644
--- a/pkgs/applications/science/math/msieve/default.nix
+++ b/pkgs/applications/science/math/msieve/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "msieve-1.53";
 
   src = fetchurl {
-    url = mirror://sourceforge/msieve/msieve/Msieve%20v1.53/msieve153_src.tar.gz;
+    url = "mirror://sourceforge/msieve/msieve/Msieve%20v1.53/msieve153_src.tar.gz";
     sha256 = "1d1vv7j4rh3nnxsmvafi73qy7lw7n3akjlm5pjl3m936yapvmz65";
   };
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   meta = {
     description = "A C library implementing a suite of algorithms to factor large integers";
     license = stdenv.lib.licenses.publicDomain;
-    homepage = http://msieve.sourceforge.net/;
+    homepage = "http://msieve.sourceforge.net/";
     maintainers = [ stdenv.lib.maintainers.roconnor ];
     platforms = [ "x86_64-linux" ] ++ stdenv.lib.platforms.darwin;
   };
diff --git a/pkgs/applications/science/math/mxnet/default.nix b/pkgs/applications/science/math/mxnet/default.nix
index bd4725ce73c..5b7688f6051 100644
--- a/pkgs/applications/science/math/mxnet/default.nix
+++ b/pkgs/applications/science/math/mxnet/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Lightweight, Portable, Flexible Distributed/Mobile Deep Learning with Dynamic, Mutation-aware Dataflow Dep Scheduler";
-    homepage = https://mxnet.incubator.apache.org/;
+    homepage = "https://mxnet.incubator.apache.org/";
     maintainers = with maintainers; [ abbradar ];
     license = licenses.asl20;
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/math/nasc/default.nix b/pkgs/applications/science/math/nasc/default.nix
index a4921785956..3fbcfecab06 100644
--- a/pkgs/applications/science/math/nasc/default.nix
+++ b/pkgs/applications/science/math/nasc/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
       answers in to future equations and if that answer changes, so does
       the equations it’s used in.
     '';
-    homepage = https://github.com/parnold-x/nasc;
+    homepage = "https://github.com/parnold-x/nasc";
     maintainers = with maintainers; [ samdroid-apps ];
     platforms = platforms.linux;
     license = licenses.gpl3Plus;
diff --git a/pkgs/applications/science/math/nauty/default.nix b/pkgs/applications/science/math/nauty/default.nix
index 986610eea60..64cc4a9aa00 100644
--- a/pkgs/applications/science/math/nauty/default.nix
+++ b/pkgs/applications/science/math/nauty/default.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ raskin timokau ];
     platforms = platforms.unix;
-    homepage = http://pallini.di.uniroma1.it/;
+    homepage = "http://pallini.di.uniroma1.it/";
   };
 }
diff --git a/pkgs/applications/science/math/pari/default.nix b/pkgs/applications/science/math/pari/default.nix
index 8f2f740f248..8b5176c94f6 100644
--- a/pkgs/applications/science/math/pari/default.nix
+++ b/pkgs/applications/science/math/pari/default.nix
@@ -81,8 +81,8 @@ stdenv.mkDerivation rec {
           run 3 or 4 times faster.) gp2c currently only understands a subset
            of the GP language.
     '';
-    homepage    = http://pari.math.u-bordeaux.fr;
-    downloadPage = http://pari.math.u-bordeaux.fr/download.html;
+    homepage    = "http://pari.math.u-bordeaux.fr";
+    downloadPage = "http://pari.math.u-bordeaux.fr/download.html";
     license     = licenses.gpl2Plus;
     maintainers = with maintainers; [ ertes raskin AndersonTorres timokau ];
     platforms   = platforms.linux ++ platforms.darwin;
diff --git a/pkgs/applications/science/math/pcalc/default.nix b/pkgs/applications/science/math/pcalc/default.nix
index 51c93f197e4..f372357fe7d 100644
--- a/pkgs/applications/science/math/pcalc/default.nix
+++ b/pkgs/applications/science/math/pcalc/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
   version = "20141224";
 
   src = fetchgit {
-    url = git://git.code.sf.net/p/pcalc/code;
+    url = "git://git.code.sf.net/p/pcalc/code";
     rev = "181d60d3c880da4344fef7138065943eb3b9255f";
     sha256 = "1hd5bh20j5xzvv6qa0fmzmv0h8sf38r7zgi7y0b6nk17pjq33v90";
   };
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ bison flex ];
 
   meta = {
-    homepage = http://pcalc.sourceforge.net/;
+    homepage = "http://pcalc.sourceforge.net/";
     description = "Programmer's calculator";
     license = licenses.gpl2;
     maintainers = with stdenv.lib.maintainers; [ ftrvxmtrx ];
diff --git a/pkgs/applications/science/math/perseus/default.nix b/pkgs/applications/science/math/perseus/default.nix
index 2d150d0c30e..55293e6c8a7 100644
--- a/pkgs/applications/science/math/perseus/default.nix
+++ b/pkgs/applications/science/math/perseus/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
       around datasets arising from point samples, images, distance
       matrices and so forth.
     '';
-    homepage = http://www.sas.upenn.edu/~vnanda/perseus/index.html;
+    homepage = "http://www.sas.upenn.edu/~vnanda/perseus/index.html";
     license = stdenv.lib.licenses.gpl3;
     maintainers = with stdenv.lib.maintainers; [erikryb];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/math/pspp/default.nix b/pkgs/applications/science/math/pspp/default.nix
index af338c74fd4..95c2c3931b3 100644
--- a/pkgs/applications/science/math/pspp/default.nix
+++ b/pkgs/applications/science/math/pspp/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = https://www.gnu.org/software/pspp/;
+    homepage = "https://www.gnu.org/software/pspp/";
     description = "A free replacement for SPSS, a program for statistical analysis of sampled data";
     license = stdenv.lib.licenses.gpl3Plus;
 
diff --git a/pkgs/applications/science/math/pynac/default.nix b/pkgs/applications/science/math/pynac/default.nix
index 4022383dbc7..82e33121671 100644
--- a/pkgs/applications/science/math/pynac/default.nix
+++ b/pkgs/applications/science/math/pynac/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
       It is a lite version of GiNaC as well, not implementing all the features
       of the full GiNaC, and it is *only* meant to be used as a Python library.
     '';
-    homepage    = http://pynac.org;
+    homepage    = "http://pynac.org";
     license = licenses.gpl3;
     maintainers = with maintainers; [ timokau ];
     platforms   = platforms.unix;
diff --git a/pkgs/applications/science/math/ratpoints/default.nix b/pkgs/applications/science/math/ratpoints/default.nix
index 71d16fb626c..fb205a69f03 100644
--- a/pkgs/applications/science/math/ratpoints/default.nix
+++ b/pkgs/applications/science/math/ratpoints/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.unix;
-    homepage = http://www.mathe2.uni-bayreuth.de/stoll/programs/;
+    homepage = "http://www.mathe2.uni-bayreuth.de/stoll/programs/";
     updateWalker = true;
   };
 }
diff --git a/pkgs/applications/science/math/ries/default.nix b/pkgs/applications/science/math/ries/default.nix
index b244ee75b30..4adf3ef2096 100644
--- a/pkgs/applications/science/math/ries/default.nix
+++ b/pkgs/applications/science/math/ries/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with stdenv.lib; {
-    homepage = https://mrob.com/pub/ries/;
+    homepage = "https://mrob.com/pub/ries/";
     description = "Tool to produce a list of equations that approximately solve to a given number";
     platforms = platforms.all;
     maintainers = with maintainers; [ symphorien ];
diff --git a/pkgs/applications/science/math/ripser/default.nix b/pkgs/applications/science/math/ripser/default.nix
index a42a5b710ce..1c8ced5ed22 100644
--- a/pkgs/applications/science/math/ripser/default.nix
+++ b/pkgs/applications/science/math/ripser/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation {
   #Patch from dev branch to make compilation work.
   #Will be removed when it gets merged into master.
   patches = [(fetchurl {
-    url = https://github.com/Ripser/ripser/commit/dc78d8ce73ee35f3828f0aad67a4e53620277ebf.patch;
+    url = "https://github.com/Ripser/ripser/commit/dc78d8ce73ee35f3828f0aad67a4e53620277ebf.patch";
     sha256 = "1y93aqpqz8fm1cxxrf90dhh67im3ndkr8dnxgbw5y96296n4r924";
   })];
 
@@ -59,7 +59,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "A lean C++ code for the computation of Vietoris–Rips persistence barcodes";
-    homepage = https://github.com/Ripser/ripser;
+    homepage = "https://github.com/Ripser/ripser";
     license = stdenv.lib.licenses.lgpl3;
     maintainers = with stdenv.lib.maintainers; [erikryb];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/math/sage/flask-oldsessions.nix b/pkgs/applications/science/math/sage/flask-oldsessions.nix
index 0899c93602b..403dc8708fa 100644
--- a/pkgs/applications/science/math/sage/flask-oldsessions.nix
+++ b/pkgs/applications/science/math/sage/flask-oldsessions.nix
@@ -31,6 +31,6 @@ buildPythonPackage rec {
     description = "Provides a session class that works like the one in Flask before 0.10.";
     license = licenses.bsd2;
     maintainers = with maintainers; [ timokau ];
-    homepage = https://github.com/mitsuhiko/flask-oldsessions;
+    homepage = "https://github.com/mitsuhiko/flask-oldsessions";
   };
 }
diff --git a/pkgs/applications/science/math/sage/flask-openid.nix b/pkgs/applications/science/math/sage/flask-openid.nix
index 9043fabd9b4..527173dec80 100644
--- a/pkgs/applications/science/math/sage/flask-openid.nix
+++ b/pkgs/applications/science/math/sage/flask-openid.nix
@@ -23,6 +23,6 @@ buildPythonPackage rec {
     description = "Adds openid support to flask applications";
     license = licenses.bsd2;
     maintainers = with maintainers; [ timokau ];
-    homepage = https://pythonhosted.org/Flask-OpenID/;
+    homepage = "https://pythonhosted.org/Flask-OpenID/";
   };
 }
diff --git a/pkgs/applications/science/math/sage/python-openid.nix b/pkgs/applications/science/math/sage/python-openid.nix
index 1bfe02f50df..4c7fdadadaf 100644
--- a/pkgs/applications/science/math/sage/python-openid.nix
+++ b/pkgs/applications/science/math/sage/python-openid.nix
@@ -35,6 +35,6 @@ buildPythonPackage rec {
     description = "OpenID library for Python";
     license = licenses.asl20;
     maintainers = with maintainers; [ timokau ];
-    homepage = https://github.com/openid/python-openid/;
+    homepage = "https://github.com/openid/python-openid/";
   };
 }
diff --git a/pkgs/applications/science/math/scilab-bin/default.nix b/pkgs/applications/science/math/scilab-bin/default.nix
index 8e85cece9b2..f9abdee2d14 100644
--- a/pkgs/applications/science/math/scilab-bin/default.nix
+++ b/pkgs/applications/science/math/scilab-bin/default.nix
@@ -96,7 +96,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    homepage = http://www.scilab.org/;
+    homepage = "http://www.scilab.org/";
     description = "Scientific software package for numerical computations (Matlab lookalike)";
     # see http://www.scilab.org/legal_notice
     license = "Scilab";
diff --git a/pkgs/applications/science/math/scilab/default.nix b/pkgs/applications/science/math/scilab/default.nix
index 02f1f4e58a9..24b3feef51e 100644
--- a/pkgs/applications/science/math/scilab/default.nix
+++ b/pkgs/applications/science/math/scilab/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "all" ];
 
   meta = {
-    homepage = http://www.scilab.org/;
+    homepage = "http://www.scilab.org/";
     description = "Scientific software package for numerical computations (Matlab lookalike)";
     # see http://www.scilab.org/legal
     license = "SciLab";
diff --git a/pkgs/applications/science/math/scotch/default.nix b/pkgs/applications/science/math/scotch/default.nix
index 610f1ef05c0..75a6b2dba68 100644
--- a/pkgs/applications/science/math/scotch/default.nix
+++ b/pkgs/applications/science/math/scotch/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
       Scotch is a software package for graph and mesh/hypergraph partitioning, graph clustering, 
       and sparse matrix ordering.
     '';
-    homepage = http://www.labri.fr/perso/pelegrin/scotch;
+    homepage = "http://www.labri.fr/perso/pelegrin/scotch";
     license = stdenv.lib.licenses.cecill-c;
     maintainers = [ stdenv.lib.maintainers.bzizou ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/math/singular/default.nix b/pkgs/applications/science/math/singular/default.nix
index fccd1489e11..a8c4f6bb9a0 100644
--- a/pkgs/applications/science/math/singular/default.nix
+++ b/pkgs/applications/science/math/singular/default.nix
@@ -112,7 +112,7 @@ stdenv.mkDerivation rec {
     # 32 bit x86 fails with some link error: `undefined reference to `__divmoddi4@GCC_7.0.0'`
     platforms = subtractLists platforms.i686 platforms.unix;
     license = licenses.gpl3; # Or GPLv2 at your option - but not GPLv4
-    homepage = http://www.singular.uni-kl.de;
+    homepage = "http://www.singular.uni-kl.de";
     downloadPage = "http://www.mathematik.uni-kl.de/ftp/pub/Math/Singular/SOURCES/";
   };
 }
diff --git a/pkgs/applications/science/math/speedcrunch/default.nix b/pkgs/applications/science/math/speedcrunch/default.nix
index 67561658eb2..4bb39ab73f5 100644
--- a/pkgs/applications/science/math/speedcrunch/default.nix
+++ b/pkgs/applications/science/math/speedcrunch/default.nix
@@ -20,7 +20,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    homepage    = http://speedcrunch.org;
+    homepage    = "http://speedcrunch.org";
     license     = licenses.gpl2Plus;
     description = "A fast power user calculator";
     longDescription = ''
diff --git a/pkgs/applications/science/math/weka/default.nix b/pkgs/applications/science/math/weka/default.nix
index ec9ea0b8533..c4fc19d6c6b 100644
--- a/pkgs/applications/science/math/weka/default.nix
+++ b/pkgs/applications/science/math/weka/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://www.cs.waikato.ac.nz/ml/weka/;
+    homepage = "http://www.cs.waikato.ac.nz/ml/weka/";
     description = "Collection of machine learning algorithms for data mining tasks";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = [ stdenv.lib.maintainers.mimame ];
diff --git a/pkgs/applications/science/math/yacas/default.nix b/pkgs/applications/science/math/yacas/default.nix
index ed680b1b4cd..c19d8f0fbc1 100644
--- a/pkgs/applications/science/math/yacas/default.nix
+++ b/pkgs/applications/science/math/yacas/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Easy to use, general purpose Computer Algebra System";
-    homepage = http://www.yacas.org/;
+    homepage = "http://www.yacas.org/";
     license = stdenv.lib.licenses.gpl2Plus;
     maintainers = with stdenv.lib.maintainers; [viric];
     platforms = with stdenv.lib.platforms; linux;
diff --git a/pkgs/applications/science/medicine/aliza/default.nix b/pkgs/applications/science/medicine/aliza/default.nix
index e135534d1ac..279f602e3fd 100644
--- a/pkgs/applications/science/medicine/aliza/default.nix
+++ b/pkgs/applications/science/medicine/aliza/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Medical imaging software with 2D, 3D and 4D capabilities";
-    homepage = https://www.aliza-dicom-viewer.com;
+    homepage = "https://www.aliza-dicom-viewer.com";
     license = licenses.unfreeRedistributable;
     maintainers = with maintainers; [ mounium ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/misc/boinc/default.nix b/pkgs/applications/science/misc/boinc/default.nix
index 38b9b8ec66d..802abae80e1 100644
--- a/pkgs/applications/science/misc/boinc/default.nix
+++ b/pkgs/applications/science/misc/boinc/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Free software for distributed and grid computing";
-    homepage = https://boinc.berkeley.edu/;
+    homepage = "https://boinc.berkeley.edu/";
     license = stdenv.lib.licenses.lgpl2Plus;
     platforms = stdenv.lib.platforms.linux;  # arbitrary choice
   };
diff --git a/pkgs/applications/science/misc/colmap/default.nix b/pkgs/applications/science/misc/colmap/default.nix
index da118f6bca5..02adb689e20 100644
--- a/pkgs/applications/science/misc/colmap/default.nix
+++ b/pkgs/applications/science/misc/colmap/default.nix
@@ -36,7 +36,7 @@ mkDerivation rec {
        COLMAP is a general-purpose Structure-from-Motion (SfM) and Multi-View Stereo (MVS) pipeline
        with a graphical and command-line interface.
     '';
-    homepage = https://colmap.github.io/index.html;
+    homepage = "https://colmap.github.io/index.html";
     license = licenses.bsd2;
     platforms = platforms.linux;
     maintainers = with maintainers; [ lebastr ];
diff --git a/pkgs/applications/science/misc/cytoscape/default.nix b/pkgs/applications/science/misc/cytoscape/default.nix
index 8ed3deed804..b4e4adbfa6f 100644
--- a/pkgs/applications/science/misc/cytoscape/default.nix
+++ b/pkgs/applications/science/misc/cytoscape/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://www.cytoscape.org;
+    homepage = "http://www.cytoscape.org";
     description = "A general platform for complex network analysis and visualization";
     license = stdenv.lib.licenses.lgpl21;
     maintainers = [stdenv.lib.maintainers.mimame];
diff --git a/pkgs/applications/science/misc/fityk/default.nix b/pkgs/applications/science/misc/fityk/default.nix
index 8d0336f5828..18def1d24e2 100644
--- a/pkgs/applications/science/misc/fityk/default.nix
+++ b/pkgs/applications/science/misc/fityk/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Curve fitting and peak fitting software";
     license = stdenv.lib.licenses.gpl2;
-    homepage = http://fityk.nieto.pl/;
+    homepage = "http://fityk.nieto.pl/";
     platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/applications/science/misc/gephi/default.nix b/pkgs/applications/science/misc/gephi/default.nix
index 577c8ecfa05..b6b53013cb4 100644
--- a/pkgs/applications/science/misc/gephi/default.nix
+++ b/pkgs/applications/science/misc/gephi/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A platform for visualizing and manipulating large graphs";
-    homepage = https://gephi.org;
+    homepage = "https://gephi.org";
     license = licenses.gpl3;
     maintainers = [ maintainers.taeer ];
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/misc/gplates/default.nix b/pkgs/applications/science/misc/gplates/default.nix
index 9b510d432fb..592e36370e0 100644
--- a/pkgs/applications/science/misc/gplates/default.nix
+++ b/pkgs/applications/science/misc/gplates/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Desktop software for the interactive visualisation of plate-tectonics";
-    homepage = https://www.gplates.org;
+    homepage = "https://www.gplates.org";
     license = licenses.gpl2;
     platforms = platforms.all;
     broken = true;
diff --git a/pkgs/applications/science/misc/megam/default.nix b/pkgs/applications/science/misc/megam/default.nix
index 6cdc86d20eb..8bb64932f20 100644
--- a/pkgs/applications/science/misc/megam/default.nix
+++ b/pkgs/applications/science/misc/megam/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
           than the iterative scaling techniques used in almost every
           other maxent package out there.  '';
 
-    homepage = http://www.umiacs.umd.edu/~hal/megam;
+    homepage = "http://www.umiacs.umd.edu/~hal/megam";
 
     license = "non-commercial";
 
diff --git a/pkgs/applications/science/misc/netlogo/default.nix b/pkgs/applications/science/misc/netlogo/default.nix
index 9b0279bd4d0..af892441a47 100644
--- a/pkgs/applications/science/misc/netlogo/default.nix
+++ b/pkgs/applications/science/misc/netlogo/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
       NetLogo is a multi-agent programmable modeling environment. It is used by
       many tens of thousands of students, teachers and researchers worldwide.
     '';
-    homepage = https://ccl.northwestern.edu/netlogo/index.shtml;
+    homepage = "https://ccl.northwestern.edu/netlogo/index.shtml";
     license = licenses.gpl2;
     maintainers = [ maintainers.dpaetzel ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/misc/openmvg/default.nix b/pkgs/applications/science/misc/openmvg/default.nix
index 121e953f43a..aea376301ab 100644
--- a/pkgs/applications/science/misc/openmvg/default.nix
+++ b/pkgs/applications/science/misc/openmvg/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A library for computer-vision scientists and targeted for the Multiple View Geometry community";
-    homepage = https://openmvg.readthedocs.io/en/latest/;
+    homepage = "https://openmvg.readthedocs.io/en/latest/";
     license = stdenv.lib.licenses.mpl20;
     platforms = stdenv.lib.platforms.linux;
     maintainers = with stdenv.lib.maintainers; [ mdaiter ];
diff --git a/pkgs/applications/science/misc/openmvs/default.nix b/pkgs/applications/science/misc/openmvs/default.nix
index bb067fbca7a..efdd86f0ab2 100644
--- a/pkgs/applications/science/misc/openmvs/default.nix
+++ b/pkgs/applications/science/misc/openmvs/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A library for computer-vision scientists and especially targeted to the Multi-View Stereo reconstruction community";
-    homepage = http://cdcseacave.github.io/openMVS/;
+    homepage = "http://cdcseacave.github.io/openMVS/";
     license = licenses.agpl3;
     platforms = platforms.linux;
     maintainers = with maintainers; [ mdaiter ];
diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 8422eb8752b..fd06d721ebd 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -88,7 +88,7 @@ stdenv.mkDerivation rec {
   setupHook = ./setup-hook.sh;
 
   meta = with stdenv.lib; {
-    homepage = https://root.cern.ch/;
+    homepage = "https://root.cern.ch/";
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index b901e40a194..990952e21ac 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
   setupHook = ./setup-hook.sh;
 
   meta = with stdenv.lib; {
-    homepage = https://root.cern.ch/;
+    homepage = "https://root.cern.ch/";
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = [ maintainers.veprbl ];
diff --git a/pkgs/applications/science/misc/sasview/default.nix b/pkgs/applications/science/misc/sasview/default.nix
index ed6fa3ae886..bbbe80eb656 100644
--- a/pkgs/applications/science/misc/sasview/default.nix
+++ b/pkgs/applications/science/misc/sasview/default.nix
@@ -67,7 +67,7 @@ python.pkgs.buildPythonApplication rec {
   patches = [ ./pyparsing-fix.patch ./local_config.patch ];
 
   meta = with lib; {
-    homepage = https://www.sasview.org;
+    homepage = "https://www.sasview.org";
     description = "Fitting and data analysis for small angle scattering data";
     maintainers = with maintainers; [ rprospero ];
     license = licenses.bsd3;
diff --git a/pkgs/applications/science/misc/sasview/xhtml2pdf.nix b/pkgs/applications/science/misc/sasview/xhtml2pdf.nix
index 8eff2057928..42b9560d9b8 100644
--- a/pkgs/applications/science/misc/sasview/xhtml2pdf.nix
+++ b/pkgs/applications/science/misc/sasview/xhtml2pdf.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
 
   meta = {
     description = "A pdf converter for the ReportLab Toolkit";
-    homepage = https://github.com/xhtml2pdf/xhtml2pdf;
+    homepage = "https://github.com/xhtml2pdf/xhtml2pdf";
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ rprospero ];
   };
diff --git a/pkgs/applications/science/misc/simgrid/default.nix b/pkgs/applications/science/misc/simgrid/default.nix
index b8aef4bd53f..0ba1cd0d2fa 100644
--- a/pkgs/applications/science/misc/simgrid/default.nix
+++ b/pkgs/applications/science/misc/simgrid/default.nix
@@ -104,7 +104,7 @@ stdenv.mkDerivation rec {
       scheduling on distributed computing platforms ranging from simple
       network of workstations to Computational Grids.
     '';
-    homepage = https://simgrid.org/;
+    homepage = "https://simgrid.org/";
     license = licenses.lgpl2Plus;
     maintainers = with maintainers; [ mickours mpoquet ];
     platforms = ["x86_64-linux"];
diff --git a/pkgs/applications/science/misc/tulip/default.nix b/pkgs/applications/science/misc/tulip/default.nix
index 3f83f2f30a6..f29cd41169d 100644
--- a/pkgs/applications/science/misc/tulip/default.nix
+++ b/pkgs/applications/science/misc/tulip/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
          data that can be tailored to the problems he or she is addressing.
       '';
 
-    homepage = http://tulip.labri.fr/;
+    homepage = "http://tulip.labri.fr/";
 
     license = stdenv.lib.licenses.gpl3Plus;
 
diff --git a/pkgs/applications/science/misc/vite/default.nix b/pkgs/applications/science/misc/vite/default.nix
index 3e7c7a42eb8..0d749bb9be4 100644
--- a/pkgs/applications/science/misc/vite/default.nix
+++ b/pkgs/applications/science/misc/vite/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
       parallel or distributed applications.
     '';
 
-    homepage = http://vite.gforge.inria.fr/;
+    homepage = "http://vite.gforge.inria.fr/";
     license = stdenv.lib.licenses.cecill20;
     maintainers = with stdenv.lib.maintainers; [ ];
     platforms = stdenv.lib.platforms.linux;
diff --git a/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix b/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
index b0ed5e94637..51978e95766 100644
--- a/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
+++ b/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://www.ccp5.ac.uk/DL_POLY_C;
+    homepage = "https://www.ccp5.ac.uk/DL_POLY_C";
     description = "DL_POLY Classic is a general purpose molecular dynamics simulation package";
     license = licenses.bsdOriginal;
     platforms = [ "x86_64-linux" ];
diff --git a/pkgs/applications/science/molecular-dynamics/lammps/default.nix b/pkgs/applications/science/molecular-dynamics/lammps/default.nix
index 234bbdab315..ab706a88931 100644
--- a/pkgs/applications/science/molecular-dynamics/lammps/default.nix
+++ b/pkgs/applications/science/molecular-dynamics/lammps/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
       funding from the DOE. It is an open-source code, distributed freely
       under the terms of the GNU Public License (GPL).
       '';
-    homepage = http://lammps.sandia.gov;
+    homepage = "http://lammps.sandia.gov";
     license = licenses.gpl2;
     platforms = platforms.linux;
     maintainers = [ maintainers.costrouc ];
diff --git a/pkgs/applications/science/physics/quantomatic/default.nix b/pkgs/applications/science/physics/quantomatic/default.nix
index b22b9d412fd..a9c83310b2f 100644
--- a/pkgs/applications/science/physics/quantomatic/default.nix
+++ b/pkgs/applications/science/physics/quantomatic/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A piece of software for reasoning about monoidal theories; in particular, quantum information processing";
     license = licenses.gpl3;
-    homepage = https://quantomatic.github.io/;
+    homepage = "https://quantomatic.github.io/";
     maintainers = with maintainers; [ nickhu ];
     platforms = platforms.all;
   };
diff --git a/pkgs/applications/science/physics/sacrifice/default.nix b/pkgs/applications/science/physics/sacrifice/default.nix
index 80417f0fcc1..609fea9f7dc 100644
--- a/pkgs/applications/science/physics/sacrifice/default.nix
+++ b/pkgs/applications/science/physics/sacrifice/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
   meta = {
     description = "A standalone contribution to AGILe for steering Pythia 8";
     license     = stdenv.lib.licenses.gpl2;
-    homepage    = https://agile.hepforge.org/trac/wiki/Sacrifice;
+    homepage    = "https://agile.hepforge.org/trac/wiki/Sacrifice";
     platforms   = stdenv.lib.platforms.unix;
     maintainers = with stdenv.lib.maintainers; [ veprbl ];
   };
diff --git a/pkgs/applications/science/physics/sherpa/default.nix b/pkgs/applications/science/physics/sherpa/default.nix
index 04115399c1a..85b2ddd4d07 100644
--- a/pkgs/applications/science/physics/sherpa/default.nix
+++ b/pkgs/applications/science/physics/sherpa/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Simulation of High-Energy Reactions of PArticles in lepton-lepton, lepton-photon, photon-photon, lepton-hadron and hadron-hadron collisions";
     license     = stdenv.lib.licenses.gpl2;
-    homepage    = https://gitlab.com/sherpa-team/sherpa;
+    homepage    = "https://gitlab.com/sherpa-team/sherpa";
     platforms   = stdenv.lib.platforms.unix;
     maintainers = with stdenv.lib.maintainers; [ veprbl ];
   };
diff --git a/pkgs/applications/science/physics/xfitter/default.nix b/pkgs/applications/science/physics/xfitter/default.nix
index 818bea7d0ff..f4d70e79079 100644
--- a/pkgs/applications/science/physics/xfitter/default.nix
+++ b/pkgs/applications/science/physics/xfitter/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "The xFitter project is an open source QCD fit framework ready to extract PDFs and assess the impact of new data";
     license     = licenses.gpl3;
-    homepage    = https://www.xfitter.org/xFitter;
+    homepage    = "https://www.xfitter.org/xFitter";
     platforms   = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
   };
diff --git a/pkgs/applications/science/programming/fdr/default.nix b/pkgs/applications/science/programming/fdr/default.nix
index 2c0bb84c801..4eeca5c1759 100644
--- a/pkgs/applications/science/programming/fdr/default.nix
+++ b/pkgs/applications/science/programming/fdr/default.nix
@@ -2,7 +2,7 @@
 stdenv.mkDerivation {
   name = "fdr-4.2.3";
   src = fetchurl {
-    url = https://www.cs.ox.ac.uk/projects/fdr/downloads/fdr-3789-linux-x86_64.tar.gz;
+    url = "https://www.cs.ox.ac.uk/projects/fdr/downloads/fdr-3789-linux-x86_64.tar.gz";
     sha256 = "0n2yqichym5xdawlgk3r7yha88k7ycnx6585jfrcm7043sls1i88";
   };
 
@@ -59,7 +59,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with stdenv.lib; {
-    homepage = https://www.cs.ox.ac.uk/projects/fdr/;
+    homepage = "https://www.cs.ox.ac.uk/projects/fdr/";
     description = "The CSP refinement checker";
     license = licenses.unfreeRedistributable;
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/programming/groove/default.nix b/pkgs/applications/science/programming/groove/default.nix
index e854f20d39a..87b7b02317a 100644
--- a/pkgs/applications/science/programming/groove/default.nix
+++ b/pkgs/applications/science/programming/groove/default.nix
@@ -46,7 +46,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "GRaphs for Object-Oriented VErification";
-    homepage = http://groove.cs.utwente.nl/;
+    homepage = "http://groove.cs.utwente.nl/";
     license = licenses.asl20;
     platforms = platforms.all;
     maintainers = with maintainers; [ jfrankenau ];
diff --git a/pkgs/applications/science/programming/scyther/default.nix b/pkgs/applications/science/programming/scyther/default.nix
index b4daae1afc0..5cfe081072a 100644
--- a/pkgs/applications/science/programming/scyther/default.nix
+++ b/pkgs/applications/science/programming/scyther/default.nix
@@ -14,7 +14,7 @@ let
 
   meta = with lib; {
     description = "Scyther is a tool for the automatic verification of security protocols.";
-    homepage = https://www.cs.ox.ac.uk/people/cas.cremers/scyther/;
+    homepage = "https://www.cs.ox.ac.uk/people/cas.cremers/scyther/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ infinisil ];
     platforms = platforms.linux;
diff --git a/pkgs/applications/science/robotics/apmplanner2/default.nix b/pkgs/applications/science/robotics/apmplanner2/default.nix
index 0bc58c50335..ede698e2b0b 100644
--- a/pkgs/applications/science/robotics/apmplanner2/default.nix
+++ b/pkgs/applications/science/robotics/apmplanner2/default.nix
@@ -46,7 +46,7 @@ mkDerivation rec {
       A GUI ground control station for autonomous vehicles using the MAVLink protocol.
       Includes support for the APM and PX4 based controllers.
     '';
-    homepage = https://ardupilot.org/planner2/;
+    homepage = "https://ardupilot.org/planner2/";
     license = lib.licenses.gpl3;
     maintainers = with lib.maintainers; [ wucke13 ];
   };
diff --git a/pkgs/applications/science/robotics/betaflight-configurator/default.nix b/pkgs/applications/science/robotics/betaflight-configurator/default.nix
index 31295114375..4684ba8c193 100644
--- a/pkgs/applications/science/robotics/betaflight-configurator/default.nix
+++ b/pkgs/applications/science/robotics/betaflight-configurator/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       Various types of aircraft are supported by the tool and by Betaflight, e.g. 
       quadcopters, hexacopters, octocopters and fixed-wing aircraft.
     '';
-    homepage    = https://github.com/betaflight/betaflight/wiki;
+    homepage    = "https://github.com/betaflight/betaflight/wiki";
     license     = licenses.gpl3;
     maintainers = with maintainers; [ wucke13 ];
     platforms   = platforms.linux;
diff --git a/pkgs/applications/science/robotics/gazebo/default.nix b/pkgs/applications/science/robotics/gazebo/default.nix
index a3ebda463b9..aea298b6548 100644
--- a/pkgs/applications/science/robotics/gazebo/default.nix
+++ b/pkgs/applications/science/robotics/gazebo/default.nix
@@ -75,7 +75,7 @@ stdenv.mkDerivation rec {
     ++ optional withHdf5Support hdf5;
 
   meta = with stdenv.lib; {
-    homepage = http://gazebosim.org/;
+    homepage = "http://gazebosim.org/";
     description = "Multi-robot simulator for outdoor environments";
     license = licenses.asl20;
     maintainers = with maintainers; [ pxc ];
diff --git a/pkgs/applications/science/robotics/yarp/default.nix b/pkgs/applications/science/robotics/yarp/default.nix
index d14c0bb0fe8..df2c569a31c 100644
--- a/pkgs/applications/science/robotics/yarp/default.nix
+++ b/pkgs/applications/science/robotics/yarp/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Yet Another Robot Platform";
-    homepage = http://yarp.it;
+    homepage = "http://yarp.it";
     license = stdenv.lib.licenses.lgpl21;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.nico202 ];