treewide: remove redundant quotes

70 files changed, 212 insertions, 212 deletions

diff --git a/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix b/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
index fcdd2eb5181..02aa6567c1a 100644
--- a/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
+++ b/pkgs/development/androidndk-pkgs/androidndk-pkgs.nix
@@ -12,31 +12,31 @@ let
   # than we do. We don't just use theirs because ours are less ambiguous and
   # some builds need that clarity.
   ndkInfoFun = { config, ... }: {
-    "x86_64-apple-darwin" = {
+    x86_64-apple-darwin = {
       double = "darwin-x86_64";
     };
-    "x86_64-unknown-linux-gnu" = {
+    x86_64-unknown-linux-gnu = {
       double = "linux-x86_64";
     };
-    "i686-unknown-linux-android" = {
+    i686-unknown-linux-android = {
       triple = "i686-linux-android";
       arch = "x86";
       toolchain = "x86";
       gccVer = "4.9";
     };
-    "x86_64-unknown-linux-android" = {
+    x86_64-unknown-linux-android = {
       triple = "x86_64-linux-android";
       arch = "x86_64";
       toolchain = "x86_64";
       gccVer = "4.9";
     };
-    "armv7a-unknown-linux-androideabi" = {
+    armv7a-unknown-linux-androideabi = {
       arch = "arm";
       triple = "arm-linux-androideabi";
       toolchain = "arm-linux-androideabi";
       gccVer = "4.9";
     };
-    "aarch64-unknown-linux-android" = {
+    aarch64-unknown-linux-android = {
       arch = "arm64";
       triple = "aarch64-linux-android";
       toolchain = "aarch64-linux-android";
diff --git a/pkgs/development/compilers/binaryen/default.nix b/pkgs/development/compilers/binaryen/default.nix
index c0e6c4b5004..664335c3dad 100644
--- a/pkgs/development/compilers/binaryen/default.nix
+++ b/pkgs/development/compilers/binaryen/default.nix
@@ -5,7 +5,7 @@ let
 
   # Map from git revs to SHA256 hashes
   sha256s = {
-    "version_89" = "0rh1dq33ilq54szfgi1ajaiaj7rbylai02rhp9zm9vpwp0rw8mij";
+    version_89 = "0rh1dq33ilq54szfgi1ajaiaj7rbylai02rhp9zm9vpwp0rw8mij";
     "1.38.28" = "172s7y5f38736ic8ri3mnbdqcrkadd40a26cxcfwbscc53phl11v";
   };
 in
diff --git a/pkgs/development/compilers/ccl/default.nix b/pkgs/development/compilers/ccl/default.nix
index 6fac183125f..ec166352267 100644
--- a/pkgs/development/compilers/ccl/default.nix
+++ b/pkgs/development/compilers/ccl/default.nix
@@ -29,7 +29,7 @@ let
     };
     armv6l-linux = armv7l-linux;
   };
-  cfg = options."${stdenv.hostPlatform.system}" or (throw "missing source url for platform ${stdenv.hostPlatform.system}");
+  cfg = options.${stdenv.hostPlatform.system} or (throw "missing source url for platform ${stdenv.hostPlatform.system}");
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 90355896064..d698a6e39fe 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -12,12 +12,12 @@
 
 let
   archs = {
-    "x86_64-linux"  = "linux-x86_64";
-    "i686-linux"    = "linux-i686";
-    "x86_64-darwin" = "darwin-x86_64";
+    x86_64-linux  = "linux-x86_64";
+    i686-linux    = "linux-i686";
+    x86_64-darwin = "darwin-x86_64";
   };
 
-  arch = archs."${stdenv.system}" or (throw "system ${stdenv.system} not supported");
+  arch = archs.${stdenv.system} or (throw "system ${stdenv.system} not supported");
 
   checkInputs = [ git gmp openssl readline libxml2 libyaml ];
 
@@ -28,7 +28,7 @@ let
 
     src = fetchurl {
       url = "https://github.com/crystal-lang/crystal/releases/download/${version}/crystal-${version}-${toString rel}-${arch}.tar.gz";
-      sha256 = sha256s."${stdenv.system}";
+      sha256 = sha256s.${stdenv.system};
     };
 
     buildCommand = ''
@@ -148,27 +148,27 @@ in rec {
   binaryCrystal_0_26 = genericBinary {
     version = "0.26.1";
     sha256s = {
-      "x86_64-linux"  = "1xban102yiiwmlklxvn3xp3q546bp8hlxxpakayajkhhnpl6yv45";
-      "i686-linux"    = "1igspf1lrv7wpmz0pfrkbx8m1ykvnv4zhic53cav4nicppm2v0ic";
-      "x86_64-darwin" = "1mri8bfrcldl69gczxpihxpv1shn4bijx28m3qby8vnk0ii63n9s";
+      x86_64-linux  = "1xban102yiiwmlklxvn3xp3q546bp8hlxxpakayajkhhnpl6yv45";
+      i686-linux    = "1igspf1lrv7wpmz0pfrkbx8m1ykvnv4zhic53cav4nicppm2v0ic";
+      x86_64-darwin = "1mri8bfrcldl69gczxpihxpv1shn4bijx28m3qby8vnk0ii63n9s";
     };
   };
 
   binaryCrystal_0_27 = genericBinary {
     version = "0.27.2";
     sha256s = {
-      "x86_64-linux"  = "05l5x7kx2acgnv42fj3rr17z73ix06zvi05h7d7vf3kw0izxrasm";
-      "i686-linux"    = "1iwizkvn6pglc0azkyfhlmk9ap793krdgcnbihd1kvrvs4cz0mm9";
-      "x86_64-darwin" = "14c69ac2dmfwmb5q56ps3xyxxb0mrbc91ahk9h07c8fiqfii3k9g";
+      x86_64-linux  = "05l5x7kx2acgnv42fj3rr17z73ix06zvi05h7d7vf3kw0izxrasm";
+      i686-linux    = "1iwizkvn6pglc0azkyfhlmk9ap793krdgcnbihd1kvrvs4cz0mm9";
+      x86_64-darwin = "14c69ac2dmfwmb5q56ps3xyxxb0mrbc91ahk9h07c8fiqfii3k9g";
     };
   };
 
   binaryCrystal_0_29 = genericBinary {
     version = "0.29.0";
     sha256s = {
-      "x86_64-linux"  = "1wrk29sfx35akg7hxwpdiikvl18wd40gq1kwirw7x522hnq7vlna";
-      "i686-linux"    = "1nx0piis2k3nn7kqiijqazzbvlaavhgvsln0l3dxmpfa4i4dz5h2";
-      "x86_64-darwin" = "1fd0fbyf05abivnp3igjlrm2axf65n2wdmg4aq6nqj60ipc01rvd";
+      x86_64-linux  = "1wrk29sfx35akg7hxwpdiikvl18wd40gq1kwirw7x522hnq7vlna";
+      i686-linux    = "1nx0piis2k3nn7kqiijqazzbvlaavhgvsln0l3dxmpfa4i4dz5h2";
+      x86_64-darwin = "1fd0fbyf05abivnp3igjlrm2axf65n2wdmg4aq6nqj60ipc01rvd";
     };
   };
 
diff --git a/pkgs/development/compilers/dmd/default.nix b/pkgs/development/compilers/dmd/default.nix
index 332ded31df6..6cae1fa073b 100644
--- a/pkgs/development/compilers/dmd/default.nix
+++ b/pkgs/development/compilers/dmd/default.nix
@@ -13,7 +13,7 @@ let
   dmdConfFile = writeTextFile {
       name = "dmd.conf";
       text = (lib.generators.toINI {} {
-        "Environment" = {
+        Environment = {
           DFLAGS = ''-I@out@/include/dmd -L-L@out@/lib -fPIC ${stdenv.lib.optionalString (!targetPackages.stdenv.cc.isClang) "-L--export-dynamic"}'';
         };
       });
diff --git a/pkgs/development/compilers/elm/packages/node-composition.nix b/pkgs/development/compilers/elm/packages/node-composition.nix
index fa0a1482f97..7f20c74dbd4 100644
--- a/pkgs/development/compilers/elm/packages/node-composition.nix
+++ b/pkgs/development/compilers/elm/packages/node-composition.nix
@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-10_x"}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs.nodejs-10_x}:
 
 let
   nodeEnv = import ./node-env.nix {
diff --git a/pkgs/development/compilers/ghc/8.2.2-binary.nix b/pkgs/development/compilers/ghc/8.2.2-binary.nix
index 9fe3a7d9dba..d68bf7e24b5 100644
--- a/pkgs/development/compilers/ghc/8.2.2-binary.nix
+++ b/pkgs/development/compilers/ghc/8.2.2-binary.nix
@@ -29,23 +29,23 @@ stdenv.mkDerivation rec {
   name = "ghc-${version}-binary";
 
   src = fetchurl ({
-    "i686-linux" = {
+    i686-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-deb8-linux.tar.xz";
       sha256 = "08w2ik55dp3n95qikmrflc91lsiq01xp53ki3jlhnbj8fqnxfrwy";
     };
-    "x86_64-linux" = {
+    x86_64-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-deb8-linux.tar.xz";
       sha256 = "0ahv26304pqi3dm7i78si4pxwvg5f5dc2jwsfgvcrhcx5g30bqj8";
     };
-    "armv7l-linux" = {
+    armv7l-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-armv7-deb8-linux.tar.xz";
       sha256 = "1jmv8qmnh5bn324fivbwdcaj55kvw7cb2zq9pafmlmv3qwwx7s46";
     };
-    "aarch64-linux" = {
+    aarch64-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-aarch64-deb8-linux.tar.xz";
       sha256 = "1k2amylcp1ad67c75h1pqf7czf9m0zj1i7hdc45ghjklnfq9hrk7";
     };
-    "x86_64-darwin" = {
+    x86_64-darwin = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
       sha256 = "09swx71gh5habzbx55shz2xykgr96xkcy09nzinnm4z0yxicy3zr";
     };
diff --git a/pkgs/development/compilers/ghc/8.6.3-binary.nix b/pkgs/development/compilers/ghc/8.6.3-binary.nix
index 7e845da5b64..152bd5e4874 100644
--- a/pkgs/development/compilers/ghc/8.6.3-binary.nix
+++ b/pkgs/development/compilers/ghc/8.6.3-binary.nix
@@ -29,15 +29,15 @@ stdenv.mkDerivation rec {
   name = "ghc-${version}-binary";
 
   src = fetchurl ({
-    "i686-linux" = {
+    i686-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-deb8-linux.tar.xz";
       sha256 = "0bw8a7fxcbskf93rb4m542ff66vrmx5i5kj77qx37cbhijx70w5m";
     };
-    "x86_64-linux" = {
+    x86_64-linux = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-deb8-linux.tar.xz";
       sha256 = "1m9gaga2pzi2cx5gvasg0rx1dlvr68gmi20l67652kag6xjsa719";
     };
-    "x86_64-darwin" = {
+    x86_64-darwin = {
       url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
       sha256 = "1hbzk57v45176kxcx848p5jn5p1xbp2129ramkbzsk6plyhnkl3r";
     };
diff --git a/pkgs/development/compilers/go/1.11.nix b/pkgs/development/compilers/go/1.11.nix
index 56a386d8b97..1e370342ba3 100644
--- a/pkgs/development/compilers/go/1.11.nix
+++ b/pkgs/development/compilers/go/1.11.nix
@@ -17,13 +17,13 @@ let
   '';
 
   goarch = platform: {
-    "i686" = "386";
-    "x86_64" = "amd64";
-    "aarch64" = "arm64";
-    "arm" = "arm";
-    "armv5tel" = "arm";
-    "armv6l" = "arm";
-    "armv7l" = "arm";
+    i686 = "386";
+    x86_64 = "amd64";
+    aarch64 = "arm64";
+    arm = "arm";
+    armv5tel = "arm";
+    armv6l = "arm";
+    armv7l = "arm";
   }.${platform.parsed.cpu.name} or (throw "Unsupported system");
 
 in
diff --git a/pkgs/development/compilers/go/1.12.nix b/pkgs/development/compilers/go/1.12.nix
index 098870c9808..4560c94a64f 100644
--- a/pkgs/development/compilers/go/1.12.nix
+++ b/pkgs/development/compilers/go/1.12.nix
@@ -17,13 +17,13 @@ let
   '';
 
   goarch = platform: {
-    "i686" = "386";
-    "x86_64" = "amd64";
-    "aarch64" = "arm64";
-    "arm" = "arm";
-    "armv5tel" = "arm";
-    "armv6l" = "arm";
-    "armv7l" = "arm";
+    i686 = "386";
+    x86_64 = "amd64";
+    aarch64 = "arm64";
+    arm = "arm";
+    armv5tel = "arm";
+    armv6l = "arm";
+    armv7l = "arm";
   }.${platform.parsed.cpu.name} or (throw "Unsupported system");
 
 in
diff --git a/pkgs/development/compilers/go/1.4.nix b/pkgs/development/compilers/go/1.4.nix
index 97c243439e8..1052f1f1ae1 100644
--- a/pkgs/development/compilers/go/1.4.nix
+++ b/pkgs/development/compilers/go/1.4.nix
@@ -4,7 +4,7 @@
 , Security }:
 
 let
-  libc = if stdenv ? "cross" then libcCross else stdenv.cc.libc;
+  libc = if stdenv ? cross then libcCross else stdenv.cc.libc;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/compilers/julia/shared.nix b/pkgs/development/compilers/julia/shared.nix
index c0414c6259f..c706f2facec 100644
--- a/pkgs/development/compilers/julia/shared.nix
+++ b/pkgs/development/compilers/julia/shared.nix
@@ -129,10 +129,10 @@ stdenv.mkDerivation rec {
   makeFlags =
     let
       arch = head (splitString "-" stdenv.system);
-      march = { "x86_64" = stdenv.hostPlatform.platform.gcc.arch or "x86-64"; "i686" = "pentium4"; }."${arch}"
+      march = { x86_64 = stdenv.hostPlatform.platform.gcc.arch or "x86-64"; i686 = "pentium4"; }.${arch}
               or (throw "unsupported architecture: ${arch}");
       # Julia requires Pentium 4 (SSE2) or better
-      cpuTarget = { "x86_64" = "x86-64"; "i686" = "pentium4"; }."${arch}"
+      cpuTarget = { x86_64 = "x86-64"; i686 = "pentium4"; }.${arch}
                   or (throw "unsupported architecture: ${arch}");
     in [
       "ARCH=${arch}"
diff --git a/pkgs/development/compilers/mozart/binary.nix b/pkgs/development/compilers/mozart/binary.nix
index 2067184a5b0..8eb35f1b5f7 100644
--- a/pkgs/development/compilers/mozart/binary.nix
+++ b/pkgs/development/compilers/mozart/binary.nix
@@ -8,7 +8,7 @@ let
   version = "2.0.0";
 
   binaries = {
-    "x86_64-linux" = fetchurl {
+    x86_64-linux = fetchurl {
       url = "mirror://sourceforge/project/mozart-oz/v${version}-alpha.0/mozart2-${version}-alpha.0+build.4105.5c06ced-x86_64-linux.tar.gz";
       sha256 = "0rsfrjimjxqbwprpzzlmydl3z3aiwg5qkb052jixdxjyad7gyh5z";
     };
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
 
   preferLocalBuild = true;
 
-  src = binaries."${stdenv.hostPlatform.system}" or (throw "unsupported system: ${stdenv.hostPlatform.system}");
+  src = binaries.${stdenv.hostPlatform.system} or (throw "unsupported system: ${stdenv.hostPlatform.system}");
 
   libPath = stdenv.lib.makeLibraryPath
     [ stdenv.cc.cc
diff --git a/pkgs/development/compilers/openjdk/8.nix b/pkgs/development/compilers/openjdk/8.nix
index c93fc5a0926..e764e9c62cb 100644
--- a/pkgs/development/compilers/openjdk/8.nix
+++ b/pkgs/development/compilers/openjdk/8.nix
@@ -15,9 +15,9 @@ let
    * The JRE libraries are in directories that depend on the CPU.
    */
   architecture = {
-    "i686-linux" = "i386";
-    "x86_64-linux" = "amd64";
-    "aarch64-linux" = "aarch64";
+    i686-linux = "i386";
+    x86_64-linux = "amd64";
+    aarch64-linux = "aarch64";
   }.${stdenv.system} or (throw "Unsupported platform");
 
   update = "222";
diff --git a/pkgs/development/compilers/openjdk/openjfx/11.nix b/pkgs/development/compilers/openjdk/openjfx/11.nix
index 88d119bee80..e1c94ffb597 100644
--- a/pkgs/development/compilers/openjdk/openjfx/11.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/11.nix
@@ -59,8 +59,8 @@ let
     outputHashMode = "recursive";
     # Downloaded AWT jars differ by platform.
     outputHash = {
-      "i686-linux" = "0mjlyf6jvbis7nrm5d394sjv4hjw6k3753hr1nwdxk8skwc3ry08";
-      "x86_64-linux" = "0d4msxswdav1xsfkpr0qd3xgqkcbxzf47v1zdy5jmg5w4bs6a78a";
+      i686-linux = "0mjlyf6jvbis7nrm5d394sjv4hjw6k3753hr1nwdxk8skwc3ry08";
+      x86_64-linux = "0d4msxswdav1xsfkpr0qd3xgqkcbxzf47v1zdy5jmg5w4bs6a78a";
     }.${stdenv.system} or (throw "Unsupported platform");
   };
 
diff --git a/pkgs/development/compilers/openjdk/openjfx/12.nix b/pkgs/development/compilers/openjdk/openjfx/12.nix
index 0a1db508578..22c608f36c1 100644
--- a/pkgs/development/compilers/openjdk/openjfx/12.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/12.nix
@@ -59,8 +59,8 @@ let
     outputHashMode = "recursive";
     # Downloaded AWT jars differ by platform.
     outputHash = {
-      "x86_64-linux" = "1z5qar5l28ja4pkf5l5m48xbv3x1yrnilsv9lpf2j3vkdk9h1nci";
-      "i686-linux" = "0rbygvjc7w197fi5nxldqdrm6mpiyd3n45042g3gd4s5qk08spjd";
+      x86_64-linux = "1z5qar5l28ja4pkf5l5m48xbv3x1yrnilsv9lpf2j3vkdk9h1nci";
+      i686-linux = "0rbygvjc7w197fi5nxldqdrm6mpiyd3n45042g3gd4s5qk08spjd";
     }.${stdenv.system} or (throw "Unsupported platform");
   };
 
diff --git a/pkgs/development/compilers/rust/bootstrap.nix b/pkgs/development/compilers/rust/bootstrap.nix
index 5cf48715dae..43a72985dde 100644
--- a/pkgs/development/compilers/rust/bootstrap.nix
+++ b/pkgs/development/compilers/rust/bootstrap.nix
@@ -32,7 +32,7 @@ let
 
   src = fetchurl {
      url = "https://static.rust-lang.org/dist/rust-${version}-${platform}.tar.gz";
-     sha256 = hashes."${platform}";
+     sha256 = hashes.${platform};
   };
 
 in callPackage ./binary.nix
diff --git a/pkgs/development/coq-modules/QuickChick/default.nix b/pkgs/development/coq-modules/QuickChick/default.nix
index 874b99f2beb..ed8c7ec6a69 100644
--- a/pkgs/development/coq-modules/QuickChick/default.nix
+++ b/pkgs/development/coq-modules/QuickChick/default.nix
@@ -26,7 +26,7 @@ let params =
       sha256 = "1c34v1k37rk7v0xk2czv5n79mbjxjrm6nh3llg2mpfmdsqi68wf3";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 let recent = stdenv.lib.versionAtLeast coq.coq-version "8.8"; in
diff --git a/pkgs/development/coq-modules/Velisarios/default.nix b/pkgs/development/coq-modules/Velisarios/default.nix
index cd7ddfefb84..e7371b6bbf5 100644
--- a/pkgs/development/coq-modules/Velisarios/default.nix
+++ b/pkgs/development/coq-modules/Velisarios/default.nix
@@ -20,7 +20,7 @@ let params =
       sha256 = "0l9885nxy0n955fj1gnijlxl55lyxiv9yjfmz8hmfrn9hl8vv1m2";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/bignums/default.nix b/pkgs/development/coq-modules/bignums/default.nix
index a074b27ff65..d69eddf75a2 100644
--- a/pkgs/development/coq-modules/bignums/default.nix
+++ b/pkgs/development/coq-modules/bignums/default.nix
@@ -22,7 +22,7 @@ let params = {
         sha256 = "1slw227idwjw9a21vj3s6kal22mrmvvlpg8r7xk590ml99bn6404";
       };
     };
-    param = params."${coq.coq-version}";
+    param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/category-theory/default.nix b/pkgs/development/coq-modules/category-theory/default.nix
index 3dfa95154d3..e16a873ddc1 100644
--- a/pkgs/development/coq-modules/category-theory/default.nix
+++ b/pkgs/development/coq-modules/category-theory/default.nix
@@ -19,7 +19,7 @@ let
     "8.8" = v20190414;
     "8.9" = v20190414;
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/contribs/default.nix b/pkgs/development/coq-modules/contribs/default.nix
index faf7db09ff9..91fdb8651cc 100644
--- a/pkgs/development/coq-modules/contribs/default.nix
+++ b/pkgs/development/coq-modules/contribs/default.nix
@@ -34,7 +34,7 @@ let mkContrib = repo: revs: param:
       rev = "86ac28259030649ef51460e4de2441c8a1017751";
       sha256 = "09bbk2a7pn0j76mmapl583f8a20zqd3a1m9lkml8rpwml692bzi9";
     };
-  }."${coq.coq-version}";
+  }.${coq.coq-version};
 
   abp = mkContrib "abp" [ "8.5" "8.6" "8.7" ] {
     version = "v8.6.0";
@@ -219,7 +219,7 @@ let mkContrib = repo: revs: param:
       rev = "aa33052c1edfc5a65885942a67c2773b5d96f8cc";
       sha256 = "0mjgfdr9bzsch0dlk4vq1frkaig14dqh46r54cv0l15flxapg0iw";
     };
-  }."${coq.coq-version}";
+  }.${coq.coq-version};
 
   continuations = mkContrib "continuations" [ ] {
     version = "v8.5.0-13-g6885310";
diff --git a/pkgs/development/coq-modules/coq-elpi/default.nix b/pkgs/development/coq-modules/coq-elpi/default.nix
index 04fc428b409..c689cea1a82 100644
--- a/pkgs/development/coq-modules/coq-elpi/default.nix
+++ b/pkgs/development/coq-modules/coq-elpi/default.nix
@@ -7,7 +7,7 @@ let params = {
     sha256 = "188avk9irwjsbs5ya4ka01mpk3vw4397kv2rmsncqrrrsa1pdddk";
   };
 };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/coq-ext-lib/default.nix b/pkgs/development/coq-modules/coq-ext-lib/default.nix
index cade2bd352e..898272d402b 100644
--- a/pkgs/development/coq-modules/coq-ext-lib/default.nix
+++ b/pkgs/development/coq-modules/coq-ext-lib/default.nix
@@ -8,7 +8,7 @@ let params =
     "8.8" = { version = "0.9.8"; sha256 = "0z1ix855kdjl7zw5ca664h5njd1x8mmvf5wi37fck4dj9dgamwlz"; };
     "8.9" = { version = "0.10.1"; sha256 = "0r1vspad8fb8bry3zliiz4hfj4w1iib1l2gm115a94m6zbiksd95"; };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/coq-haskell/default.nix b/pkgs/development/coq-modules/coq-haskell/default.nix
index 57f31e1847c..b8a34c49417 100644
--- a/pkgs/development/coq-modules/coq-haskell/default.nix
+++ b/pkgs/development/coq-modules/coq-haskell/default.nix
@@ -26,7 +26,7 @@ let params =
       sha256 = "09dq1vvshhlhgjccrhqgbhnq2hrys15xryfszqq11rzpgvl2zgdv";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/coqhammer/default.nix b/pkgs/development/coq-modules/coqhammer/default.nix
index 28c651f9b16..83a505017fb 100644
--- a/pkgs/development/coq-modules/coqhammer/default.nix
+++ b/pkgs/development/coq-modules/coqhammer/default.nix
@@ -9,7 +9,7 @@ let
       sha256 = "0hmqwsry8ldg4g4hhwg4b84dgzibpdrg1wwsajhlyqfx3fb3n3b5";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/coqprime/default.nix b/pkgs/development/coq-modules/coqprime/default.nix
index c67342f1a2f..6228bd4be9d 100644
--- a/pkgs/development/coq-modules/coqprime/default.nix
+++ b/pkgs/development/coq-modules/coqprime/default.nix
@@ -15,7 +15,7 @@ let params =
     "8.9" = v_8_8;
     "8.10" = v_8_8;
     };
-  param = params."${coq.coq-version}"
+  param = params.${coq.coq-version}
 ; in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/dpdgraph/default.nix b/pkgs/development/coq-modules/dpdgraph/default.nix
index e403f7d4fb5..401cb299497 100644
--- a/pkgs/development/coq-modules/dpdgraph/default.nix
+++ b/pkgs/development/coq-modules/dpdgraph/default.nix
@@ -22,7 +22,7 @@ let params = {
     sha256 = "0qvar8gfbrcs9fmvkph5asqz4l5fi63caykx3bsn8zf0xllkwv0n";
   };
 };
-param = params."${coq.coq-version}";
+param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation {
diff --git a/pkgs/development/coq-modules/equations/default.nix b/pkgs/development/coq-modules/equations/default.nix
index 5446b540fac..38444fe2b06 100644
--- a/pkgs/development/coq-modules/equations/default.nix
+++ b/pkgs/development/coq-modules/equations/default.nix
@@ -32,7 +32,7 @@ let
       sha256 = "1v5kx0xzxzsbs5r4w08rm1lrmjjggnd3ap0sd1my88ds17jzyasd";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/ltac2/default.nix b/pkgs/development/coq-modules/ltac2/default.nix
index 30917fcb78f..80b167aaa98 100644
--- a/pkgs/development/coq-modules/ltac2/default.nix
+++ b/pkgs/development/coq-modules/ltac2/default.nix
@@ -17,7 +17,7 @@ let params = {
     sha256 = "0xby1kb26r9gcvk5511wqj05fqm9paynwfxlfqkmwkgnfmzk0x73";
   };
 };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/coq-modules/mathcomp/default.nix b/pkgs/development/coq-modules/mathcomp/default.nix
index d573eca809a..2b653cdaa26 100644
--- a/pkgs/development/coq-modules/mathcomp/default.nix
+++ b/pkgs/development/coq-modules/mathcomp/default.nix
@@ -30,7 +30,7 @@ let
   # COMPUTED using the configuration above (edit with caution) #
   ##############################################################
   default-mathcomp-version = let v = head (
-    filter (mc: mathcomp-coq-versions."${mc}" coq.coq-version)
+    filter (mc: mathcomp-coq-versions.${mc} coq.coq-version)
             mathcomp-version-preference ++ ["0.0.0"]);
      in if v == "0.0.0" then max-mathcomp-version else v;
 
@@ -126,9 +126,9 @@ let
         };
       };
     in
-    {"${mathcomp-pkg}" = stdenv.mkDerivation (attrs // overrides attrs);};
+    {${mathcomp-pkg} = stdenv.mkDerivation (attrs // overrides attrs);};
 
-getAttrOr = a: n: a."${n}" or (throw a.error);
+getAttrOr = a: n: a.${n} or (throw a.error);
 
 mathcompCorePkgs_1_7 = mathcompGen "1.7.0";
 mathcompCorePkgs_1_8 = mathcompGen "1.8.0";
diff --git a/pkgs/development/coq-modules/mathcomp/extra.nix b/pkgs/development/coq-modules/mathcomp/extra.nix
index 0d9557623c3..c342c25a411 100644
--- a/pkgs/development/coq-modules/mathcomp/extra.nix
+++ b/pkgs/development/coq-modules/mathcomp/extra.nix
@@ -139,7 +139,7 @@ packageGen = {
                                else compatibleCoqVersions;
     mc-core-deps = if builtins.isNull core-deps then [ssreflect] else core-deps;
   in
-  { "${package}" = let from = src; in
+  { ${package} = let from = src; in
 
   stdenv.mkDerivation rec {
     inherit version;
@@ -149,7 +149,7 @@ packageGen = {
       owner = owner;
       repo = package;
       rev = version;
-      sha256 = version-sha256."${version}";
+      sha256 = version-sha256.${version};
     } else from;
 
     propagatedBuildInputs = [ coq ] ++ mc-core-deps ++ extra-deps;
@@ -173,7 +173,7 @@ packageGen = {
   };
   };
 
-current-versions = versions."${current-ssreflect.version}" or {};
+current-versions = versions.${current-ssreflect.version} or {};
 
 select = x: mapAttrs (n: pkg: {package = n;} // pkg) (recursiveUpdate param x);
 
@@ -181,14 +181,14 @@ for-version = v: suffix: (mapAttrs' (n: pkg:
         {name = "mathcomp_${suffix}-${n}";
          value = (packageGen ({
              ssreflect = coqPackages."mathcomp-ssreflect_${suffix}";
-           } // pkg))."${n}";})
-        (select versions."${v}"));
+           } // pkg)).${n};})
+        (select versions.${v}));
 
 all = (for-version "1.7.0" "1_7") //
       (for-version "1.8.0" "1_8") //
       (for-version "1.9.0" "1_9") //
      (recurseIntoAttrs (mapDerivationAttrset dontDistribute (
-        mapAttrs' (n: pkg: {name = "mathcomp-${n}"; value = (packageGen pkg)."${n}";})
+        mapAttrs' (n: pkg: {name = "mathcomp-${n}"; value = (packageGen pkg).${n};})
               (select current-versions))));
 in
 {
diff --git a/pkgs/development/coq-modules/paramcoq/default.nix b/pkgs/development/coq-modules/paramcoq/default.nix
index 472d3aeb2d0..a8dd74dd5fb 100644
--- a/pkgs/development/coq-modules/paramcoq/default.nix
+++ b/pkgs/development/coq-modules/paramcoq/default.nix
@@ -15,7 +15,7 @@ let params =
       sha256 = "002xabhjlph394vydw3dx8ipv5ry2nq3py4440bk9a18ljx0w6ll";
     };
   };
-  param = params."${coq.coq-version}";
+  param = params.${coq.coq-version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/interpreters/acl2/default.nix b/pkgs/development/interpreters/acl2/default.nix
index d53337aca1a..8d93492209c 100644
--- a/pkgs/development/interpreters/acl2/default.nix
+++ b/pkgs/development/interpreters/acl2/default.nix
@@ -17,8 +17,8 @@ in stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "acl2-devel";
     repo = "acl2-devel";
-    rev = revs."${version}";
-    sha256 = hashes."${version}";
+    rev = revs.${version};
+    sha256 = hashes.${version};
   };
 
   buildInputs = [ sbcl
diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index a7009097a60..62cc77c1253 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -88,7 +88,7 @@ let
           (import ./patchsets.nix {
             inherit patchSet useRailsExpress ops;
             patchLevel = ver.patchLevel;
-          })."${ver.majMinTiny}";
+          }).${ver.majMinTiny};
 
         postUnpack = ''
           cp -r ${rubygems} $sourceRoot/rubygems
diff --git a/pkgs/development/libraries/fflas-ffpack/default.nix b/pkgs/development/libraries/fflas-ffpack/default.nix
index 858bc209391..649a90200e0 100644
--- a/pkgs/development/libraries/fflas-ffpack/default.nix
+++ b/pkgs/development/libraries/fflas-ffpack/default.nix
@@ -30,14 +30,14 @@ stdenv.mkDerivation rec {
     "--with-lapack-libs=-l${blas.linkName}"
   ] ++ stdenv.lib.optionals stdenv.isx86_64 {
     # disable SIMD instructions (which are enabled *when available* by default)
-    "default"        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "westmere"       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "sandybridge"    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "ivybridge"      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "haswell"        = [                                                                                                                         "--disable-fma4" ];
-    "broadwell"      = [                                                                                                                         "--disable-fma4" ];
-    "skylake"        = [                                                                                                                         "--disable-fma4" ];
-    "skylake-avx512" = [                                                                                                                         "--disable-fma4" ];
+    default        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    westmere       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    sandybridge    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    ivybridge      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    haswell        = [                                                                                                                         "--disable-fma4" ];
+    broadwell      = [                                                                                                                         "--disable-fma4" ];
+    skylake        = [                                                                                                                         "--disable-fma4" ];
+    skylake-avx512 = [                                                                                                                         "--disable-fma4" ];
   }.${stdenv.hostPlatform.platform.gcc.arch or "default"};
 
   doCheck = true;
diff --git a/pkgs/development/libraries/g2o/default.nix b/pkgs/development/libraries/g2o/default.nix
index 909c504870f..21975766e74 100644
--- a/pkgs/development/libraries/g2o/default.nix
+++ b/pkgs/development/libraries/g2o/default.nix
@@ -25,14 +25,14 @@ stdenv.mkDerivation rec {
     "-DQGLVIEWER_INCLUDE_DIR=${libsForQt5.libqglviewer}/include/QGLViewer"
     "-DG2O_BUILD_EXAMPLES=OFF"
   ] ++ lib.optionals stdenv.isx86_64 ([ "-DDO_SSE_AUTODETECT=OFF" ] ++ {
-    "default"        = [ "-DDISABLE_SSE3=ON" "-DDISABLE_SSE4_1=ON" "-DDISABLE_SSE4_2=ON" "-DDISABLE_SSE4_A=ON" ];
-    "westmere"       = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "sandybridge"    = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "ivybridge"      = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "haswell"        = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "broadwell"      = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "skylake"        = [                                                                 "-DDISABLE_SSE4_A=ON" ];
-    "skylake-avx512" = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    default        = [ "-DDISABLE_SSE3=ON" "-DDISABLE_SSE4_1=ON" "-DDISABLE_SSE4_2=ON" "-DDISABLE_SSE4_A=ON" ];
+    westmere       = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    sandybridge    = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    ivybridge      = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    haswell        = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    broadwell      = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    skylake        = [                                                                 "-DDISABLE_SSE4_A=ON" ];
+    skylake-avx512 = [                                                                 "-DDISABLE_SSE4_A=ON" ];
   }.${stdenv.hostPlatform.platform.gcc.arch or "default"});
 
   postInstall = ''
diff --git a/pkgs/development/libraries/givaro/default.nix b/pkgs/development/libraries/givaro/default.nix
index 79fb7a8d738..4c1e538dcd6 100644
--- a/pkgs/development/libraries/givaro/default.nix
+++ b/pkgs/development/libraries/givaro/default.nix
@@ -18,14 +18,14 @@ stdenv.mkDerivation rec {
     "--disable-optimization"
   ] ++ stdenv.lib.optionals stdenv.isx86_64 {
     # disable SIMD instructions (which are enabled *when available* by default)
-    "default"        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "westmere"       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "sandybridge"    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "ivybridge"      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "haswell"        = [                                                                                                                         "--disable-fma4" ];
-    "broadwell"      = [                                                                                                                         "--disable-fma4" ];
-    "skylake"        = [                                                                                                                         "--disable-fma4" ];
-    "skylake-avx512" = [                                                                                                                         "--disable-fma4" ];
+    default        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    westmere       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    sandybridge    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    ivybridge      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    haswell        = [                                                                                                                         "--disable-fma4" ];
+    broadwell      = [                                                                                                                         "--disable-fma4" ];
+    skylake        = [                                                                                                                         "--disable-fma4" ];
+    skylake-avx512 = [                                                                                                                         "--disable-fma4" ];
   }.${stdenv.hostPlatform.platform.gcc.arch or "default"};
 
   # On darwin, tests are linked to dylib in the nix store, so we need to make
diff --git a/pkgs/development/libraries/java/swt/default.nix b/pkgs/development/libraries/java/swt/default.nix
index 591de48d319..a93d7774291 100644
--- a/pkgs/development/libraries/java/swt/default.nix
+++ b/pkgs/development/libraries/java/swt/default.nix
@@ -5,13 +5,13 @@
 
 let
   platformMap = {
-    "x86_64-linux" =
+    x86_64-linux =
       { platform = "gtk-linux-x86_64";
         sha256 = "1qq0pjll6030v4ml0hifcaaik7sx3fl7ghybfdw95vsvxafwp2ff"; };
-    "i686-linux" =
+    i686-linux =
       { platform = "gtk-linux-x86";
         sha256 = "03mhzraikcs4fsz7d3h5af9pw1bbcfd6dglsvbk2ciwimy9zj30q"; };
-    "x86_64-darwin" =
+    x86_64-darwin =
       { platform = "cocoa-macosx-x86_64";
         sha256 = "00k1mfbncvyh8klgmk0891w8jwnd5niqb16j1j8yacrm2smmlb05"; };
   };
diff --git a/pkgs/development/libraries/kde-frameworks/default.nix b/pkgs/development/libraries/kde-frameworks/default.nix
index e8a7aa7322f..ef1171b1760 100644
--- a/pkgs/development/libraries/kde-frameworks/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/default.nix
@@ -64,7 +64,7 @@ let
           let
 
             inherit (args) name;
-            inherit (srcs."${name}") src version;
+            inherit (srcs.${name}) src version;
 
             outputs = args.outputs or [ "bin" "dev" "out" ];
             hasSeparateDev = lib.elem "dev" outputs;
diff --git a/pkgs/development/libraries/linbox/default.nix b/pkgs/development/libraries/linbox/default.nix
index f5cb197dfe5..8635b8c412f 100644
--- a/pkgs/development/libraries/linbox/default.nix
+++ b/pkgs/development/libraries/linbox/default.nix
@@ -37,14 +37,14 @@ stdenv.mkDerivation rec {
     "--disable-optimization"
   ] ++ stdenv.lib.optionals stdenv.isx86_64 {
     # disable SIMD instructions (which are enabled *when available* by default)
-    "default"        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "westmere"       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "sandybridge"    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "ivybridge"      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
-    "haswell"        = [                                                                                                                         "--disable-fma4" ];
-    "broadwell"      = [                                                                                                                         "--disable-fma4" ];
-    "skylake"        = [                                                                                                                         "--disable-fma4" ];
-    "skylake-avx512" = [                                                                                                                         "--disable-fma4" ];
+    default        = [ "--disable-sse3" "--disable-ssse3" "--disable-sse41" "--disable-sse42" "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    westmere       = [                                                                        "--disable-avx" "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    sandybridge    = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    ivybridge      = [                                                                                        "--disable-avx2" "--disable-fma" "--disable-fma4" ];
+    haswell        = [                                                                                                                         "--disable-fma4" ];
+    broadwell      = [                                                                                                                         "--disable-fma4" ];
+    skylake        = [                                                                                                                         "--disable-fma4" ];
+    skylake-avx512 = [                                                                                                                         "--disable-fma4" ];
   }.${stdenv.hostPlatform.platform.gcc.arch or "default"}
   ++ stdenv.lib.optionals withSage [
     "--enable-sage"
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index bd4802b8775..84cfb47b554 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -44,10 +44,10 @@ let
     # TODO(@Ericson2314): Improve with mass rebuild
     configurePlatforms = [];
     configureScript = {
-        "x86_64-darwin"  = "./Configure darwin64-x86_64-cc";
-        "x86_64-solaris" = "./Configure solaris64-x86_64-gcc";
-        "armv6l-linux" = "./Configure linux-armv4 -march=armv6";
-        "armv7l-linux" = "./Configure linux-armv4 -march=armv7-a";
+        x86_64-darwin  = "./Configure darwin64-x86_64-cc";
+        x86_64-solaris = "./Configure solaris64-x86_64-gcc";
+        armv6l-linux = "./Configure linux-armv4 -march=armv6";
+        armv7l-linux = "./Configure linux-armv4 -march=armv7-a";
       }.${stdenv.hostPlatform.system} or (
         if stdenv.hostPlatform == stdenv.buildPlatform
           then "./config"
diff --git a/pkgs/development/libraries/oracle-instantclient/default.nix b/pkgs/development/libraries/oracle-instantclient/default.nix
index 2e90d867b5a..6c5d4b94d53 100644
--- a/pkgs/development/libraries/oracle-instantclient/default.nix
+++ b/pkgs/development/libraries/oracle-instantclient/default.nix
@@ -17,22 +17,22 @@ let
   throwSystem = throw "Unsupported system: ${stdenv.hostPlatform.system}";
 
   arch = {
-    "x86_64-linux" = "linux.x64";
-    "x86_64-darwin" = "macos.x64";
-  }."${stdenv.hostPlatform.system}" or throwSystem;
+    x86_64-linux = "linux.x64";
+    x86_64-darwin = "macos.x64";
+  }.${stdenv.hostPlatform.system} or throwSystem;
 
   srcs = {
-    "x86_64-linux" = [
+    x86_64-linux = [
       (requireSource "basic" arch version "" "5015e3c9fba84e009f7519893f798a1622c37d1ae2c55104ff502c52a0fe5194")
       (requireSource "sdk" arch version "" "7f404c3573c062ce487a51ac4cfe650c878d7edf8e73b364ec852645ed1098cb")
       (requireSource "sqlplus" arch version "" "d49b2bd97376591ca07e7a836278933c3f251875c215044feac73ba9f451dfc2") ]
       ++ optional odbcSupport (requireSource "odbc" arch version "2" "365a4ae32c7062d9fbc3fb41add748e7881f774484a175a4b41a2c294ce9095d");
-    "x86_64-darwin" = [
+    x86_64-darwin = [
       (requireSource "basic" arch version "2" "3ed3102e5a24f0da638694191edb34933309fb472eb1df21ad5c86eedac3ebb9")
       (requireSource "sdk" arch version "2" "e0befca9c4e71ebc9f444957ffa70f01aeeec5976ea27c40406471b04c34848b")
       (requireSource "sqlplus" arch version "2" "d147cbb5b2a954fdcb4b642df4f0bd1153fd56e0f56e7fa301601b4f7e2abe0e") ]
       ++ optional odbcSupport (requireSource "odbc" arch version "2" "1805c1ab6c8c5e8df7bdcc35d7f2b94c329ecf4dff9bde55d5f9b159ecd8b64e");
-  }."${stdenv.hostPlatform.system}" or throwSystem;
+  }.${stdenv.hostPlatform.system} or throwSystem;
 
   extLib = stdenv.hostPlatform.extensions.sharedLibrary;
 in stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 8250e42a1b6..e2c71a77062 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -255,14 +255,14 @@ stdenv.mkDerivation {
       if (!stdenv.hostPlatform.isx86_64)
       then [ "-no-sse2" ]
       else lib.optionals (compareVersion "5.9.0" >= 0) {
-        "default"        = [ "-sse2" "-no-sse3" "-no-ssse3" "-no-sse4.1" "-no-sse4.2" "-no-avx" "-no-avx2" ];
-        "westmere"       = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2" "-no-avx" "-no-avx2" ];
-        "sandybridge"    = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx" "-no-avx2" ];
-        "ivybridge"      = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx" "-no-avx2" ];
-        "haswell"        = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
-        "broadwell"      = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
-        "skylake"        = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
-        "skylake-avx512" = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
+        default        = [ "-sse2" "-no-sse3" "-no-ssse3" "-no-sse4.1" "-no-sse4.2" "-no-avx" "-no-avx2" ];
+        westmere       = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2" "-no-avx" "-no-avx2" ];
+        sandybridge    = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx" "-no-avx2" ];
+        ivybridge      = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx" "-no-avx2" ];
+        haswell        = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
+        broadwell      = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
+        skylake        = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
+        skylake-avx512 = [ "-sse2"    "-sse3"    "-ssse3"    "-sse4.1"    "-sse4.2"    "-avx"    "-avx2" ];
       }.${stdenv.hostPlatform.platform.gcc.arch or "default"}
     )
     ++ [
diff --git a/pkgs/development/libraries/qt-5/qtModule.nix b/pkgs/development/libraries/qt-5/qtModule.nix
index 84a9d30918b..5003205ef37 100644
--- a/pkgs/development/libraries/qt-5/qtModule.nix
+++ b/pkgs/development/libraries/qt-5/qtModule.nix
@@ -8,14 +8,14 @@ args:
 
 let
   inherit (args) name;
-  version = args.version or srcs."${name}".version;
-  src = args.src or srcs."${name}".src;
+  version = args.version or srcs.${name}.version;
+  src = args.src or srcs.${name}.src;
 in
 
 mkDerivation (args // {
   name = "${name}-${version}";
   inherit src;
-  patches = args.patches or patches."${name}" or [];
+  patches = args.patches or patches.${name} or [];
 
   nativeBuildInputs = (args.nativeBuildInputs or []) ++ [ perl self.qmake ];
   propagatedBuildInputs = args.qtInputs ++ (args.propagatedBuildInputs or []);
diff --git a/pkgs/development/libraries/science/math/tensorflow/binary-hashes.nix b/pkgs/development/libraries/science/math/tensorflow/binary-hashes.nix
index 892dfa2a609..76f0c5eea7f 100644
--- a/pkgs/development/libraries/science/math/tensorflow/binary-hashes.nix
+++ b/pkgs/development/libraries/science/math/tensorflow/binary-hashes.nix
@@ -1,14 +1,14 @@
 {
 version = "1.14.0";
-"cpu-linux-x86_64" = {
+cpu-linux-x86_64 = {
   url = "https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-cpu-linux-x86_64-1.14.0.tar.gz";
   sha256 = "04bi3ijq4sbb8c5vk964zlv0j9mrjnzzxd9q9knq3h273nc1a36k";
 };
-"gpu-linux-x86_64" = {
+gpu-linux-x86_64 = {
   url = "https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-gpu-linux-x86_64-1.14.0.tar.gz";
   sha256 = "1ffnpyj9jjgwxpjfiyjvq4dm3n6nwiksim5jld9zw7fdswh215x6";
 };
-"cpu-darwin-x86_64" = {
+cpu-darwin-x86_64 = {
   url = "https://storage.googleapis.com/tensorflow/libtensorflow/libtensorflow-cpu-darwin-x86_64-1.14.0.tar.gz";
   sha256 = "0zsd5ils1a17j6jzh0c7q1z56fw46gkzybbnms7h2rgg8al0rh92";
 };
diff --git a/pkgs/development/libraries/v8/5_x.nix b/pkgs/development/libraries/v8/5_x.nix
index cb53765e394..050abe9e81b 100644
--- a/pkgs/development/libraries/v8/5_x.nix
+++ b/pkgs/development/libraries/v8/5_x.nix
@@ -17,7 +17,7 @@ let
   sharedFlag = if static then "static_library" else "shared_library";
 
   deps = {
-    "build" = fetchgit {
+    build = fetchgit {
       url = "${git_url}/chromium/src/build.git";
       rev = "2c67d4d74b6b3673228fab191918500a582ef3b0";
       sha256 = "0jc7hci5yh792pw0ahjfxrk5xzllnlrv9llmwlgcgn2x8x6bn34q";
@@ -32,7 +32,7 @@ let
       rev = "b5ecbb29a26532f72ef482569b223d5a51fd50bf";
       sha256 = "0ld47wdnk8grcba221z67l3pnphv9zwifk4y44f5b946w3iwmpns";
     };
-    "buildtools" = fetchgit {
+    buildtools = fetchgit {
       url = "${git_url}/chromium/buildtools.git";
       rev = "60f7f9a8b421ebf9a46041dfa2ff11c0fe59c582";
       sha256 = "0i10bw7yhslklqwcx5krs3k05sicb73cpwd0mkaz96yxsvmkvjq0";
diff --git a/pkgs/development/libraries/v8/default.nix b/pkgs/development/libraries/v8/default.nix
index 2d9c5d4b92a..e367d8242de 100644
--- a/pkgs/development/libraries/v8/default.nix
+++ b/pkgs/development/libraries/v8/default.nix
@@ -14,7 +14,7 @@ let
       rev    = "936ba8a963284a6b3737cf2f0474a7131073abee";
       sha256 = "14nr22fqdpxma1kzjflj6a865vr3hfnnm2gs4vcixyq4kmfzfcy2";
     };
-    "build" = fetchgit {
+    build = fetchgit {
       url    = "${git_url}/chromium/src/build.git";
       rev    = "325e95d6dae64f35b160b3dc7d73218cee5ec079";
       sha256 = "0dddyxa76p2xpjhmxif05v63i5ar6h5v684fdl667sg84f5bhhxf";
diff --git a/pkgs/development/libraries/v8/plv8_6_x.nix b/pkgs/development/libraries/v8/plv8_6_x.nix
index bda3f07f0a4..f1155c41c12 100644
--- a/pkgs/development/libraries/v8/plv8_6_x.nix
+++ b/pkgs/development/libraries/v8/plv8_6_x.nix
@@ -24,12 +24,12 @@ let
       rev    = "0e9a47d74970bee1bbfc063c47215406f8918699";
       sha256 = "07rbzrlscp8adh4z86yl5jxdnvgkc3xs950xldpk318wf9i3bh6c";
     };
-    "build" = fetchgit {
+    build = fetchgit {
       url    = "${git_url}/chromium/src/build.git";
       rev    = "9338ce52d0b9bcef34c38285fbd5023b62739fac";
       sha256 = "1s2sa8dy3waidsirjylc82ggb18l1108bczjc8z0v4ywyj4k0cvh";
     };
-    "buildtools" = fetchgit {
+    buildtools = fetchgit {
       url    = "${git_url}/chromium/buildtools.git";
       rev    = "505de88083136eefd056e5ee4ca0f01fe9b33de8";
       sha256 = "0vj216nhb803bggsl0hnyagj8njrm96pn8sim6xcnqb7nhz1vabw";
diff --git a/pkgs/development/mobile/androidenv/compose-android-packages.nix b/pkgs/development/mobile/androidenv/compose-android-packages.nix
index e5802c12e81..15bb18f5e24 100644
--- a/pkgs/development/mobile/androidenv/compose-android-packages.nix
+++ b/pkgs/development/mobile/androidenv/compose-android-packages.nix
@@ -79,14 +79,14 @@ rec {
   platform-tools = import ./platform-tools.nix {
     inherit deployAndroidPackage os autoPatchelfHook pkgs;
     inherit (stdenv) lib;
-    package = packages.platform-tools."${platformToolsVersion}";
+    package = packages.platform-tools.${platformToolsVersion};
   };
 
   build-tools = map (version:
     import ./build-tools.nix {
       inherit deployAndroidPackage os autoPatchelfHook makeWrapper pkgs pkgs_i686;
       inherit (stdenv) lib;
-      package = packages.build-tools."${version}";
+      package = packages.build-tools.${version};
     }
   ) buildToolsVersions;
 
@@ -98,20 +98,20 @@ rec {
   emulator = import ./emulator.nix {
     inherit deployAndroidPackage os autoPatchelfHook makeWrapper pkgs pkgs_i686;
     inherit (stdenv) lib;
-    package = packages.emulator."${emulatorVersion}"."${os}";
+    package = packages.emulator.${emulatorVersion}.${os};
   };
 
   platforms = map (version:
     deployAndroidPackage {
       inherit os;
-      package = packages.platforms."${version}";
+      package = packages.platforms.${version};
     }
   ) platformVersions;
 
   sources = map (version:
     deployAndroidPackage {
       inherit os;
-      package = packages.sources."${version}";
+      package = packages.sources.${version};
     }
   ) platformVersions;
 
@@ -130,7 +130,7 @@ rec {
     import ./lldb.nix {
       inherit deployAndroidPackage os autoPatchelfHook pkgs;
       inherit (stdenv) lib;
-      package = packages.lldb."${version}";
+      package = packages.lldb.${version};
     }
   ) lldbVersions;
 
@@ -138,27 +138,27 @@ rec {
     import ./cmake.nix {
       inherit deployAndroidPackage os autoPatchelfHook pkgs;
       inherit (stdenv) lib;
-      package = packages.cmake."${version}";
+      package = packages.cmake.${version};
     }
   ) cmakeVersions;
 
   ndk-bundle = import ./ndk-bundle {
     inherit deployAndroidPackage os autoPatchelfHook makeWrapper pkgs platform-tools;
     inherit (stdenv) lib;
-    package = packages.ndk-bundle."${ndkVersion}";
+    package = packages.ndk-bundle.${ndkVersion};
   };
 
   google-apis = map (version:
     deployAndroidPackage {
       inherit os;
-      package = addons.addons."${version}".google_apis;
+      package = addons.addons.${version}.google_apis;
     }
   ) (builtins.filter (platformVersion: platformVersion < "26") platformVersions); # API level 26 and higher include Google APIs by default
 
   google-tv-addons = map (version:
     deployAndroidPackage {
       inherit os;
-      package = addons.addons."${version}".google_tv_addon;
+      package = addons.addons.${version}.google_tv_addon;
     }
   ) platformVersions;
 
@@ -226,10 +226,10 @@ rec {
       # Link extras
       ${stdenv.lib.concatMapStrings (identifier:
         let
-          path = addons.extras."${identifier}".path;
+          path = addons.extras.${identifier}.path;
           addon = deployAndroidPackage {
             inherit os;
-            package = addons.extras."${identifier}";
+            package = addons.extras.${identifier};
           };
         in
         ''
diff --git a/pkgs/development/mobile/androidenv/tools.nix b/pkgs/development/mobile/androidenv/tools.nix
index 9957168f7af..92f53e5a7c2 100644
--- a/pkgs/development/mobile/androidenv/tools.nix
+++ b/pkgs/development/mobile/androidenv/tools.nix
@@ -19,8 +19,8 @@ if toolsVersion == "26.0.1" then import ./tools/26.nix {
   };
 } else if toolsVersion == "26.1.1" then import ./tools/26.nix {
   inherit deployAndroidPackage lib autoPatchelfHook makeWrapper os pkgs pkgs_i686 postInstall;
-  package = packages.tools."${toolsVersion}";
+  package = packages.tools.${toolsVersion};
 } else import ./tools/25.nix {
   inherit deployAndroidPackage lib autoPatchelfHook makeWrapper os pkgs pkgs_i686 postInstall;
-  package = packages.tools."${toolsVersion}";
+  package = packages.tools.${toolsVersion};
 }
diff --git a/pkgs/development/node-packages/composition-v10.nix b/pkgs/development/node-packages/composition-v10.nix
index 9f723a6da47..9e2521717ef 100644
--- a/pkgs/development/node-packages/composition-v10.nix
+++ b/pkgs/development/node-packages/composition-v10.nix
@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-10_x"}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs.nodejs-10_x}:
 
 let
   nodeEnv = import ./node-env.nix {
diff --git a/pkgs/development/node-packages/composition-v12.nix b/pkgs/development/node-packages/composition-v12.nix
index 4f05009f3ef..4ed0336ec5c 100644
--- a/pkgs/development/node-packages/composition-v12.nix
+++ b/pkgs/development/node-packages/composition-v12.nix
@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-6_x"}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs.nodejs-6_x}:
 
 let
   nodeEnv = import ./node-env.nix {
diff --git a/pkgs/development/ocaml-modules/labltk/default.nix b/pkgs/development/ocaml-modules/labltk/default.nix
index b4a4e012560..d92cf543f80 100644
--- a/pkgs/development/ocaml-modules/labltk/default.nix
+++ b/pkgs/development/ocaml-modules/labltk/default.nix
@@ -25,7 +25,7 @@ let param = {
     key = "1764";
     sha256 = "0wgx65y1wkgf22ihpqmspqfp95fqbj3pldhp1p3b1mi8rmc37zwj";
   };
-}."${builtins.substring 0 4 ocaml.version}";
+}.${builtins.substring 0 4 ocaml.version};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/ocaml-modules/lwt/legacy.nix b/pkgs/development/ocaml-modules/lwt/legacy.nix
index cd40a5051be..d93f87aac0d 100644
--- a/pkgs/development/ocaml-modules/lwt/legacy.nix
+++ b/pkgs/development/ocaml-modules/lwt/legacy.nix
@@ -14,7 +14,7 @@ let sha256 = {
   "3.0.0" = "0wwhnl9hppixcsdisinj1wmffx0nv6hkpm01z9qvkngkrazi3i88";
   "2.7.1" = "0w7f59havrl2fsnvs84lm7wlqpsrldg80gy5afpnpr21zkw22g8w";
   "2.6.0" = "0f1h83zh60rspm4fxd96z9h5bkhq1n1q968hgq92sq4a6bfi1c2w";
-}."${version}"; in
+}.${version}; in
 
 let optionals = stdenv.lib.optionals (!stdenv.lib.versionAtLeast version "3"); in
 
diff --git a/pkgs/development/ocaml-modules/ppx_tools/default.nix b/pkgs/development/ocaml-modules/ppx_tools/default.nix
index 2aa74d751db..262c621a94a 100644
--- a/pkgs/development/ocaml-modules/ppx_tools/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_tools/default.nix
@@ -20,7 +20,7 @@ let param = {
   "4.07" = {
     version = "5.1+4.06.0";
     sha256 = "1ww4cspdpgjjsgiv71s0im5yjkr3544x96wsq1vpdacq7dr7zwiw"; };
-}."${ocaml.meta.branch}";
+}.${ocaml.meta.branch};
 in
   stdenv.mkDerivation {
     name = "ocaml${ocaml.version}-ppx_tools-${param.version}";
diff --git a/pkgs/development/python-modules/numpy/default.nix b/pkgs/development/python-modules/numpy/default.nix
index 10a1df8876c..45972a710da 100644
--- a/pkgs/development/python-modules/numpy/default.nix
+++ b/pkgs/development/python-modules/numpy/default.nix
@@ -5,7 +5,7 @@ let
   cfg = writeTextFile {
     name = "site.cfg";
     text = (lib.generators.toINI {} {
-      "${blasImplementation}" = {
+      ${blasImplementation} = {
         include_dirs = "${blas}/include";
         library_dirs = "${blas}/lib";
       } // lib.optionalAttrs (blasImplementation == "mkl") {
diff --git a/pkgs/development/python-modules/spacy/models.nix b/pkgs/development/python-modules/spacy/models.nix
index d9a67454fe6..b091c3b7d56 100644
--- a/pkgs/development/python-modules/spacy/models.nix
+++ b/pkgs/development/python-modules/spacy/models.nix
@@ -13,7 +13,7 @@ let
     meta = with stdenv.lib; {
       description = "Models for the spaCy NLP library";
       homepage    = "https://github.com/explosion/spacy-models";
-      license     = licenses."${license}";
+      license     = licenses.${license};
       maintainers = with maintainers; [ rvl ];
     };
   };
diff --git a/pkgs/development/ruby-modules/bundled-common/default.nix b/pkgs/development/ruby-modules/bundled-common/default.nix
index c31dfb63b3c..0812ff590a5 100644
--- a/pkgs/development/ruby-modules/bundled-common/default.nix
+++ b/pkgs/development/ruby-modules/bundled-common/default.nix
@@ -52,7 +52,7 @@ let
     name
   else
     let
-      gem = gems."${pname}";
+      gem = gems.${pname};
       version = gem.version;
     in
       "${pname}-${version}";
@@ -70,7 +70,7 @@ let
 
   maybeCopyAll = pkgname: if pkgname == null then "" else
   let
-    mainGem = gems."${pkgname}" or (throw "bundlerEnv: gem ${pkgname} not found");
+    mainGem = gems.${pkgname} or (throw "bundlerEnv: gem ${pkgname} not found");
   in
     copyIfBundledByPath mainGem;
 
diff --git a/pkgs/development/ruby-modules/bundled-common/functions.nix b/pkgs/development/ruby-modules/bundled-common/functions.nix
index 6324f27e9fa..a093cc4dc95 100644
--- a/pkgs/development/ruby-modules/bundled-common/functions.nix
+++ b/pkgs/development/ruby-modules/bundled-common/functions.nix
@@ -42,21 +42,21 @@ in rec {
       converge expandDependencies directlyMatchingGems;
 
   platformMatches = {rubyEngine, version, ...}: attrs: (
-  !(attrs ? "platforms") ||
+  !(attrs ? platforms) ||
   builtins.length attrs.platforms == 0 ||
     builtins.any (platform:
       platform.engine == rubyEngine &&
-        (!(platform ? "version") || platform.version == version.majMin)
+        (!(platform ? version) || platform.version == version.majMin)
     ) attrs.platforms
   );
 
   groupMatches = groups: attrs:
-    groups == null || !(attrs ? "groups") ||
+    groups == null || !(attrs ? groups) ||
       (intersectLists (groups ++ [ "default" ]) attrs.groups) != [];
 
   applyGemConfigs = attrs:
-    (if gemConfig ? "${attrs.gemName}"
-    then attrs // gemConfig."${attrs.gemName}" attrs
+    (if gemConfig ? ${attrs.gemName}
+    then attrs // gemConfig.${attrs.gemName} attrs
     else attrs);
 
   genStubsScript = { lib, ruby, confFiles, bundler, groups, binPaths, ... }: ''
@@ -88,6 +88,6 @@ in rec {
     inherit (attrs.source) type;
     source = removeAttrs attrs.source ["type"];
     gemName = name;
-    gemPath = map (gemName: gems."${gemName}") (attrs.dependencies or []);
+    gemPath = map (gemName: gems.${gemName}) (attrs.dependencies or []);
   });
 }
diff --git a/pkgs/development/ruby-modules/bundler-env/default.nix b/pkgs/development/ruby-modules/bundler-env/default.nix
index b3f91b678c4..9e9ccb128cf 100644
--- a/pkgs/development/ruby-modules/bundler-env/default.nix
+++ b/pkgs/development/ruby-modules/bundler-env/default.nix
@@ -49,7 +49,7 @@ in
       postBuild = genStubsScript {
         inherit lib ruby bundler groups;
         confFiles = basicEnv.confFiles;
-        binPaths = [ basicEnv.gems."${pname}" ];
+        binPaths = [ basicEnv.gems.${pname} ];
       } + lib.optionalString (postBuild != null) postBuild;
 
       meta = { platforms = ruby.meta.platforms; } // meta;
diff --git a/pkgs/development/tools/build-managers/bazel/default.nix b/pkgs/development/tools/build-managers/bazel/default.nix
index df8ccfc0e4a..a7da68da544 100644
--- a/pkgs/development/tools/build-managers/bazel/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/default.nix
@@ -46,11 +46,11 @@ let
       srcs.io_bazel_rules_sass
       srcs.platforms
       (if stdenv.hostPlatform.isDarwin
-       then srcs.${"java_tools_javac11_darwin-v2.0.zip"}
-       else srcs.${"java_tools_javac11_linux-v2.0.zip"})
-      srcs.${"coverage_output_generator-v1.0.zip"}
+       then srcs."java_tools_javac11_darwin-v2.0.zip"
+       else srcs."java_tools_javac11_linux-v2.0.zip")
+      srcs."coverage_output_generator-v1.0.zip"
       srcs.build_bazel_rules_nodejs
-      srcs.${"android_tools_pkg-0.7.tar.gz"}
+      srcs."android_tools_pkg-0.7.tar.gz"
       ]);
 
   distDir = runCommand "bazel-deps" {} ''
diff --git a/pkgs/development/tools/build-managers/meson/default.nix b/pkgs/development/tools/build-managers/meson/default.nix
index b5ee5d75817..94304f052fd 100644
--- a/pkgs/development/tools/build-managers/meson/default.nix
+++ b/pkgs/development/tools/build-managers/meson/default.nix
@@ -3,11 +3,11 @@
 let
   # See https://mesonbuild.com/Reference-tables.html#cpu-families
   cpuFamilies = {
-    "aarch64" = "aarch64";
-    "armv6l"  = "arm";
-    "armv7l"  = "arm";
-    "i686"    = "x86";
-    "x86_64"  = "x86_64";
+    aarch64 = "aarch64";
+    armv6l  = "arm";
+    armv7l  = "arm";
+    i686    = "x86";
+    x86_64  = "x86_64";
   };
 in
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/development/tools/misc/kibana/5.x.nix b/pkgs/development/tools/misc/kibana/5.x.nix
index ce88838cc73..5e96ec499bf 100644
--- a/pkgs/development/tools/misc/kibana/5.x.nix
+++ b/pkgs/development/tools/misc/kibana/5.x.nix
@@ -4,16 +4,16 @@ with stdenv.lib;
 let
   inherit (builtins) elemAt;
   archOverrides = {
-    "i686" = "x86";
+    i686 = "x86";
   };
   info = splitString "-" stdenv.hostPlatform.system;
   arch = (elemAt info 0);
-  elasticArch = archOverrides."${arch}" or arch;
+  elasticArch = archOverrides.${arch} or arch;
   plat = elemAt info 1;
   shas = {
-    "x86_64-linux"  = "0hzr47hyw54b9j4c33n6f6n3pala6kjhyvinfszgikbghyhb7fsa";
-    "i686-linux"    = "0bka4h31cw10ii4pfygc81pwc3wr32pzw3v4k4bi8rnqbk280fmn";
-    "x86_64-darwin" = "0jqc2g89rqkla0alqxr14sh4pccfn514jrwr7mkjivxdapygh1ll";
+    x86_64-linux  = "0hzr47hyw54b9j4c33n6f6n3pala6kjhyvinfszgikbghyhb7fsa";
+    i686-linux    = "0bka4h31cw10ii4pfygc81pwc3wr32pzw3v4k4bi8rnqbk280fmn";
+    x86_64-darwin = "0jqc2g89rqkla0alqxr14sh4pccfn514jrwr7mkjivxdapygh1ll";
   };
 in stdenv.mkDerivation rec {
   pname = "kibana";
@@ -21,7 +21,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://artifacts.elastic.co/downloads/kibana/${pname}-${version}-${plat}-${elasticArch}.tar.gz";
-    sha256 = shas."${stdenv.hostPlatform.system}" or (throw "Unknown architecture");
+    sha256 = shas.${stdenv.hostPlatform.system} or (throw "Unknown architecture");
   };
 
   buildInputs = [ makeWrapper ];
diff --git a/pkgs/development/tools/misc/kibana/6.x.nix b/pkgs/development/tools/misc/kibana/6.x.nix
index 0d052f34095..d8b01b2e375 100644
--- a/pkgs/development/tools/misc/kibana/6.x.nix
+++ b/pkgs/development/tools/misc/kibana/6.x.nix
@@ -18,12 +18,12 @@ let
   shas =
     if enableUnfree
     then {
-      "x86_64-linux"  = "1i3zmzxihplwd8n994lfxhhgygdg3qxjqgrj1difa8w3vss0zbfn";
-      "x86_64-darwin" = "09a96ms9id77infxd9xxfs6r7j01mn0rz5yw3g9sl92j9ri7r52c";
+      x86_64-linux  = "1i3zmzxihplwd8n994lfxhhgygdg3qxjqgrj1difa8w3vss0zbfn";
+      x86_64-darwin = "09a96ms9id77infxd9xxfs6r7j01mn0rz5yw3g9sl92j9ri7r52c";
     }
     else {
-      "x86_64-linux"  = "166rhxr0qlv1yarj2mg1c3b8mxvhl70jhz53azq7ic6laj55q7fk";
-      "x86_64-darwin" = "0ngngkbl036p2mzwhp8qafi3aqzk398a218w12srfqny5n630vdk";
+      x86_64-linux  = "166rhxr0qlv1yarj2mg1c3b8mxvhl70jhz53azq7ic6laj55q7fk";
+      x86_64-darwin = "0ngngkbl036p2mzwhp8qafi3aqzk398a218w12srfqny5n630vdk";
     };
 
 in stdenv.mkDerivation rec {
@@ -32,7 +32,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://artifacts.elastic.co/downloads/kibana/${name}-${plat}-${arch}.tar.gz";
-    sha256 = shas."${stdenv.hostPlatform.system}" or (throw "Unknown architecture");
+    sha256 = shas.${stdenv.hostPlatform.system} or (throw "Unknown architecture");
   };
 
   patches = [
diff --git a/pkgs/development/tools/misc/kibana/7.x.nix b/pkgs/development/tools/misc/kibana/7.x.nix
index e8435549f4a..dbf9a713781 100644
--- a/pkgs/development/tools/misc/kibana/7.x.nix
+++ b/pkgs/development/tools/misc/kibana/7.x.nix
@@ -18,12 +18,12 @@ let
   shas =
     if enableUnfree
     then {
-      "x86_64-linux"  = "1mzycd0ljnkslz9p9jhq279bkpk35r7svhngxjnmsh11ampsvxb8";
-      "x86_64-darwin" = "1bz409njdpmsagh5dg062114wpa96w7pmxwfjsizwksqyyjdwdv7";
+      x86_64-linux  = "1mzycd0ljnkslz9p9jhq279bkpk35r7svhngxjnmsh11ampsvxb8";
+      x86_64-darwin = "1bz409njdpmsagh5dg062114wpa96w7pmxwfjsizwksqyyjdwdv7";
     }
     else {
-      "x86_64-linux"  = "1x3gjc9xa03m4jfnl5vjxigzcnb8ysnhxgd8618v85x4l0010v38";
-      "x86_64-darwin" = "1nsbmrswv2jv2z7686i2sf6rrmxysbqi5ih6jjrbrqnk64xi18j2";
+      x86_64-linux  = "1x3gjc9xa03m4jfnl5vjxigzcnb8ysnhxgd8618v85x4l0010v38";
+      x86_64-darwin = "1nsbmrswv2jv2z7686i2sf6rrmxysbqi5ih6jjrbrqnk64xi18j2";
     };
 
 in stdenv.mkDerivation rec {
@@ -32,7 +32,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://artifacts.elastic.co/downloads/kibana/${name}-${plat}-${arch}.tar.gz";
-    sha256 = shas."${stdenv.hostPlatform.system}" or (throw "Unknown architecture");
+    sha256 = shas.${stdenv.hostPlatform.system} or (throw "Unknown architecture");
   };
 
   patches = [
diff --git a/pkgs/development/tools/ocaml/camlp4/default.nix b/pkgs/development/tools/ocaml/camlp4/default.nix
index 4a4203a2f59..a7ef6d7bedd 100644
--- a/pkgs/development/tools/ocaml/camlp4/default.nix
+++ b/pkgs/development/tools/ocaml/camlp4/default.nix
@@ -22,7 +22,7 @@ let param = {
   "4.08" = {
      version = "4.08+1";
      sha256 = "0qplawvxwai25bi27niw2cgz2al01kcnkj8wxwhxslpi21z6pyx1"; };
-  }."${ocaml.meta.branch}";
+  }.${ocaml.meta.branch};
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
index e6fb1b353d2..e535ba29aeb 100644
--- a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
+++ b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
     sha256 = {
       "2.7" = "1dali1akyd4zmkwav0d957ynxq2jj6cc94r4xiaql7ca89ajz4jj";
       "2.8.4" = "098ph50s9kqw6rc3qjn39zv9b5swdf4qr44afwqfkkjgjs5d7vbl";
-    }."${version}";
+    }.${version};
   };
 
   buildInputs = [ ocaml findlib menhir ocsigen_deriving ocamlbuild
diff --git a/pkgs/development/tools/selenium/chromedriver/default.nix b/pkgs/development/tools/selenium/chromedriver/default.nix
index 5937b00f459..eff06daac06 100644
--- a/pkgs/development/tools/selenium/chromedriver/default.nix
+++ b/pkgs/development/tools/selenium/chromedriver/default.nix
@@ -4,18 +4,18 @@
 }:
 let
   allSpecs = {
-    "x86_64-linux" = {
+    x86_64-linux = {
       system = "linux64";
       sha256 = "04wb6h57daxmnv3a3xrcsznawbx7r8wyi1vk1g26z2l2ppcnsbzv";
     };
 
-    "x86_64-darwin" = {
+    x86_64-darwin = {
       system = "mac64";
       sha256 = "0f8j7m8ardaaw8pv02vxhwkqbcm34366bln0np0j0ig21d4fag09";
     };
   };
 
-  spec = allSpecs."${stdenv.hostPlatform.system}"
+  spec = allSpecs.${stdenv.hostPlatform.system}
     or (throw "missing chromedriver binary for ${stdenv.hostPlatform.system}");
 
   libs = stdenv.lib.makeLibraryPath [
diff --git a/pkgs/development/web/remarkjs/nodepkgs.nix b/pkgs/development/web/remarkjs/nodepkgs.nix
index 10fbc98d51a..bbdaeb5d292 100644
--- a/pkgs/development/web/remarkjs/nodepkgs.nix
+++ b/pkgs/development/web/remarkjs/nodepkgs.nix
@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-10_x"}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs.nodejs-10_x}:
 
 let
   nodeEnv = import ../../node-packages/node-env.nix {