Merge branch 'bower2nix'

8 files changed, 4318 insertions, 65 deletions

diff --git a/doc/languages-frameworks/bower.xml b/doc/languages-frameworks/bower.xml
new file mode 100644
index 00000000000..742d3c2e9fe
--- /dev/null
+++ b/doc/languages-frameworks/bower.xml
@@ -0,0 +1,244 @@
+<section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="sec-bower">
+
+<title>Bower</title>
+
+<para>
+  <link xlink:href="http://bower.io">Bower</link> is a package manager
+  for web site front-end components. Bower packages (comprising of
+  build artefacts and sometimes sources) are stored in
+  <command>git</command> repositories, typically on Github. The
+  package registry is run by the Bower team with package metadata
+  coming from the <filename>bower.json</filename> file within each
+  package.
+</para>
+
+<para>
+  The end result of running Bower is a
+  <filename>bower_components</filename> directory which can be included
+  in the web app's build process.
+</para>
+
+<para>
+  Bower can be run interactively, by installing
+  <varname>nodePackages.bower</varname>. More interestingly, the Bower
+  components can be declared in a Nix derivation, with the help of
+  <varname>nodePackages.bower2nix</varname>.
+</para>
+
+<section xml:id="ssec-bower2nix-usage">
+  <title><command>bower2nix</command> usage</title>
+
+<para>
+  Suppose you have a <filename>bower.json</filename> with the following contents:
+
+
+<example xml:id="ex-bowerJson"><title><filename>bower.json</filename></title>
+<programlisting language="json">
+<![CDATA[{
+  "name": "my-web-app",
+  "dependencies": {
+    "angular": "~1.5.0",
+    "bootstrap": "~3.3.6"
+  }
+}]]>
+</programlisting>
+</example>
+</para>
+
+
+<para>
+  Running <command>bower2nix</command> will produce something like the
+  following output:
+
+<programlisting language="nix">
+<![CDATA[{ fetchbower, buildEnv }:
+buildEnv { name = "bower-env"; ignoreCollisions = true; paths = [
+  (fetchbower "angular" "1.5.3" "~1.5.0" "1749xb0firxdra4rzadm4q9x90v6pzkbd7xmcyjk6qfza09ykk9y")
+  (fetchbower "bootstrap" "3.3.6" "~3.3.6" "1vvqlpbfcy0k5pncfjaiskj3y6scwifxygfqnw393sjfxiviwmbv")
+  (fetchbower "jquery" "2.2.2" "1.9.1 - 2" "10sp5h98sqwk90y4k6hbdviwqzvzwqf47r3r51pakch5ii2y7js1")
+]; }]]>
+</programlisting>
+</para>
+
+
+<para>
+  Using the <command>bower2nix</command> command line arguments, the
+  output can be redirected to a file. A name like
+  <filename>bower-packages.nix</filename> would be fine.
+</para>
+
+<para>
+  The resulting derivation is a union of all the downloaded Bower
+  packages (and their dependencies). To use it, they still need to be
+  linked together by Bower, which is where
+  <varname>buildBowerComponents</varname> is useful.
+</para>
+</section>
+
+<section xml:id="ssec-build-bower-components"><title><varname>buildBowerComponents</varname> function</title>
+
+  <para>
+  The function is implemented in <link xlink:href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/bower-modules/generic/default.nix">
+  <filename>pkgs/development/bower-modules/generic/default.nix</filename></link>.
+  Example usage:
+
+<example xml:id="ex-buildBowerComponents"><title>buildBowerComponents</title>
+<programlisting language="nix">
+bowerComponents = buildBowerComponents {
+  name = "my-web-app";
+  generated = ./bower-packages.nix; <co xml:id="ex-buildBowerComponents-1" />
+  src = myWebApp; <co xml:id="ex-buildBowerComponents-2" />
+};
+</programlisting>
+</example>
+  </para>
+
+<para>
+In <xref linkend="ex-buildBowerComponents" />, the following arguments
+are of special significance to the function:
+
+<calloutlist>
+  <callout arearefs="ex-buildBowerComponents-1">
+    <para>
+      <varname>generated</varname> specifies the file which was created by <command>bower2nix</command>.
+    </para>
+  </callout>
+
+  <callout arearefs="ex-buildBowerComponents-2">
+    <para>
+      <varname>src</varname> is your project's sources. It needs to
+      contain a <filename>bower.json</filename> file.
+    </para>
+  </callout>
+</calloutlist>
+</para>
+
+<para>
+  <varname>buildBowerComponents</varname> will run Bower to link
+  together the output of <command>bower2nix</command>, resulting in a
+  <filename>bower_components</filename> directory which can be used.
+</para>
+
+<para>
+  Here is an example of a web frontend build process using
+  <command>gulp</command>. You might use <command>grunt</command>, or
+  anything else.
+</para>
+
+<example xml:id="ex-bowerGulpFile"><title>Example build script (<filename>gulpfile.js</filename>)</title>
+<programlisting language="javascript">
+<![CDATA[var gulp = require('gulp');
+
+gulp.task('default', [], function () {
+  gulp.start('build');
+});
+
+gulp.task('build', [], function () {
+  console.log("Just a dummy gulp build");
+  gulp
+    .src(["./bower_components/**/*"])
+    .pipe(gulp.dest("./gulpdist/"));
+});]]>
+</programlisting>
+</example>
+
+<example xml:id="ex-buildBowerComponentsDefaultNix">
+  <title>Full example — <filename>default.nix</filename></title>
+<programlisting language="nix">
+{ myWebApp ? { outPath = ./.; name = "myWebApp"; }
+, pkgs ? import &lt;nixpkgs&gt; {}
+}:
+
+pkgs.stdenv.mkDerivation {
+  name = "my-web-app-frontend";
+  src = myWebApp;
+
+  buildInputs = [ pkgs.nodePackages.gulp ];
+
+  bowerComponents = pkgs.buildBowerComponents { <co xml:id="ex-buildBowerComponentsDefault-1" />
+    name = "my-web-app";
+    generated = ./bower-packages.nix;
+    src = myWebApp;
+  };
+
+  buildPhase = ''
+    cp --reflink=auto --no-preserve=mode -R $bowerComponents/bower_components . <co xml:id="ex-buildBowerComponentsDefault-2" />
+    export HOME=$PWD <co xml:id="ex-buildBowerComponentsDefault-3" />
+    ${pkgs.nodePackages.gulp}/bin/gulp build <co xml:id="ex-buildBowerComponentsDefault-4" />
+  '';
+
+  installPhase = "mv gulpdist $out";
+}
+</programlisting>
+</example>
+
+<para>
+A few notes about <xref linkend="ex-buildBowerComponentsDefaultNix" />:
+
+<calloutlist>
+  <callout arearefs="ex-buildBowerComponentsDefault-1">
+    <para>
+      The result of <varname>buildBowerComponents</varname> is an
+      input to the frontend build.
+    </para>
+  </callout>
+
+  <callout arearefs="ex-buildBowerComponentsDefault-2">
+    <para>
+      Whether to symlink or copy the
+      <filename>bower_components</filename> directory depends on the
+      build tool in use. In this case a copy is used to avoid
+      <command>gulp</command> silliness with permissions.
+    </para>
+  </callout>
+
+  <callout arearefs="ex-buildBowerComponentsDefault-3">
+    <para>
+      <command>gulp</command> requires <varname>HOME</varname> to
+      refer to a writeable directory.
+    </para>
+  </callout>
+
+  <callout arearefs="ex-buildBowerComponentsDefault-4">
+    <para>
+      The actual build command. Other tools could be used.
+    </para>
+  </callout>
+</calloutlist>
+</para>
+</section>
+
+<section xml:id="ssec-bower2nix-troubleshooting">
+  <title>Troubleshooting</title>
+
+<variablelist>
+
+  <varlistentry>
+    <term>
+    <literal>ENOCACHE</literal> errors from
+    <varname>buildBowerComponents</varname>
+    </term>
+    <listitem>
+      <para>
+        This means that Bower was looking for a package version which
+        doesn't exist in the generated
+        <filename>bower-packages.nix</filename>.
+      </para>
+      <para>
+        If <filename>bower.json</filename> has been updated, then run
+        <command>bower2nix</command> again.
+      </para>
+      <para>
+        It could also be a bug in <command>bower2nix</command> or
+        <command>fetchbower</command>. If possible, try reformulating
+        the version specification in <filename>bower.json</filename>.
+      </para>
+    </listitem>
+  </varlistentry>
+</variablelist>
+
+</section>
+
+</section>
diff --git a/doc/languages-frameworks/index.xml b/doc/languages-frameworks/index.xml
index ab62afa40d6..63c4b7dec60 100644
--- a/doc/languages-frameworks/index.xml
+++ b/doc/languages-frameworks/index.xml
@@ -24,6 +24,24 @@ such as Perl or Haskell.  These are described in this chapter.</para>
 <xi:include href="r.xml" /> <!-- generated from ../../pkgs/development/r-modules/README.md  -->
 <xi:include href="qt.xml" />
 <xi:include href="texlive.xml" />
+<xi:include href="bower.xml" />
+
+
+<!--
+<section><title>Haskell</title>
+
+<para>TODO</para>
+
+</section>
+
+
+<section><title>TeX / LaTeX</title>
+
+<para>* Special support for building TeX documents</para>
+
+</section>
+-->
+>>>>>>> 05113a5... nixpkgs manual: Add documentation for bower2nix
 
 
 </chapter>
diff --git a/pkgs/build-support/fetchbower/default.nix b/pkgs/build-support/fetchbower/default.nix
index 057beb999b2..11d88ae10e9 100644
--- a/pkgs/build-support/fetchbower/default.nix
+++ b/pkgs/build-support/fetchbower/default.nix
@@ -1,11 +1,26 @@
-{ stdenv, fetch-bower, git }: name: version: target: outputHash: stdenv.mkDerivation {
-  name = "${name}-${version}";
-  buildCommand = ''
-    out=$PWD/out fetch-bower "${name}" "${version}" "${target}"
-    cp -R out $out
-  '';
-  outputHashMode = "recursive";
-  outputHashAlgo = "sha256";
-  inherit outputHash;
-  buildInputs = [git fetch-bower];
-}
+{ stdenv, lib, bower2nix }:
+let
+  bowerVersion = version:
+    let
+      components = lib.splitString "#" version;
+      hash = lib.last components;
+      ver = if builtins.length components == 1 then version else hash;
+    in ver;
+
+  fetchbower = name: version: target: outputHash: stdenv.mkDerivation {
+    name = "${name}-${bowerVersion version}";
+    buildCommand = ''
+      fetch-bower --quiet --out=$PWD/out "${name}" "${target}" "${version}"
+      # In some cases, the result of fetchBower is different depending
+      # on the output directory (e.g. if the bower package contains
+      # symlinks). So use a local output directory before copying to
+      # $out.
+      cp -R out $out
+    '';
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+    inherit outputHash;
+    buildInputs = [ bower2nix ];
+  };
+
+in fetchbower
diff --git a/pkgs/development/bower-modules/generic/default.nix b/pkgs/development/bower-modules/generic/default.nix
new file mode 100644
index 00000000000..ba15b588160
--- /dev/null
+++ b/pkgs/development/bower-modules/generic/default.nix
@@ -0,0 +1,49 @@
+{ pkgs }:
+
+{ buildInputs ? [], generated, ... } @ attrs:
+
+let
+  # Fetches the bower packages. `generated` should be the result of a
+  # `bower2nix` command.
+  bowerPackages = import generated {
+    inherit (pkgs) buildEnv fetchbower;
+  };
+
+in pkgs.stdenv.mkDerivation (
+  attrs
+  //
+  {
+    name = "bower_components-" + attrs.name;
+
+    inherit bowerPackages;
+
+    builder = builtins.toFile "builder.sh" ''
+      source $stdenv/setup
+
+      # The project's bower.json is required
+      cp $src/bower.json .
+
+      # Dereference symlinks -- bower doesn't like them
+      cp  --recursive --reflink=auto       \
+          --dereference --no-preserve=mode \
+          $bowerPackages bc
+
+      # Bower install in offline mode -- links together the fetched
+      # bower packages.
+      HOME=$PWD bower \
+          --config.storage.packages=bc/packages \
+          --config.storage.registry=bc/registry \
+          --offline install
+
+      # Sets up a single bower_components directory within
+      # the output derivation.
+      mkdir -p $out
+      mv bower_components $out
+    '';
+
+    buildInputs = buildInputs ++ [
+      pkgs.git
+      pkgs.nodePackages.bower
+    ];
+  }
+)
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cbc85185e92..60ec2ba3564 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -171,7 +171,7 @@ in
   };
 
   fetchbower = callPackage ../build-support/fetchbower {
-    inherit (nodePackages) fetch-bower;
+    inherit (nodePackages) bower2nix;
   };
 
   fetchbzr = callPackage ../build-support/fetchbzr { };
@@ -9156,6 +9156,10 @@ in
 
   yuicompressor = callPackage ../development/tools/yuicompressor { };
 
+  ### DEVELOPMENT / BOWER MODULES (JAVASCRIPT)
+
+  buildBowerComponents = callPackage ../development/bower-modules/generic { };
+
   ### DEVELOPMENT / GO MODULES
 
   go14Packages = callPackage ./go-packages.nix {
diff --git a/pkgs/top-level/node-packages-generated.nix b/pkgs/top-level/node-packages-generated.nix
index 12d0aff2616..7cd7245edd8 100644
--- a/pkgs/top-level/node-packages-generated.nix
+++ b/pkgs/top-level/node-packages-generated.nix
@@ -4477,7 +4477,24 @@
     os = [ ];
     cpu = [ ];
   };
-  "bower" = self.by-version."bower"."1.4.1";
+  by-version."bower"."1.7.7" = self.buildNodePackage {
+    name = "bower-1.7.7";
+    version = "1.7.7";
+    bin = true;
+    src = fetchurl {
+      url = "http://registry.npmjs.org/bower/-/bower-1.7.7.tgz";
+      name = "bower-1.7.7.tgz";
+      sha1 = "2fd7ff3ebdcba5a8ffcd84c397c8fdfe9f825f92";
+    };
+    deps = {
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
+  "bower" = self.by-version."bower"."1.7.7";
   by-spec."bower".">=1.2.8 <2" =
     self.by-version."bower"."1.4.1";
   by-spec."bower-config"."^0.6.1" =
@@ -4633,35 +4650,30 @@
     cpu = [ ];
   };
   by-spec."bower2nix"."*" =
-    self.by-version."bower2nix"."2.1.0";
-  by-version."bower2nix"."2.1.0" = self.buildNodePackage {
-    name = "bower2nix-2.1.0";
-    version = "2.1.0";
-    bin = true;
+    self.by-version."bower2nix"."3.0.1";
+  by-version."bower2nix"."3.0.1" = self.buildNodePackage {
+    name = "bower2nix-3.0.1";
+    version = "3.0.1";
     src = fetchurl {
-      url = "http://registry.npmjs.org/bower2nix/-/bower2nix-2.1.0.tgz";
-      name = "bower2nix-2.1.0.tgz";
-      sha1 = "213f507a729b20a1c3cb48f995a034f9c05f53e6";
+      url = "http://registry.npmjs.org/bower2nix/-/bower2nix-3.0.1.tgz";
+      name = "bower2nix-3.0.1.tgz";
+      sha256 = "0jfrz2mvnx3fp2p76dcnw18c1vajladbqcrzapf93jh8h6715msi";
     };
     deps = {
-      "temp-0.6.0" = self.by-version."temp"."0.6.0";
-      "fs.extra-1.3.2" = self.by-version."fs.extra"."1.3.2";
-      "bower-json-0.4.0" = self.by-version."bower-json"."0.4.0";
+      "argparse-1.0.4" = self.by-version."argparse"."1.0.4";
+      "bower-1.7.7" = self.by-version."bower"."1.7.7";
       "bower-endpoint-parser-0.2.1" = self.by-version."bower-endpoint-parser"."0.2.1";
+      "bower-json-0.6.0" = self.by-version."bower-json"."0.6.0";
       "bower-logger-0.2.1" = self.by-version."bower-logger"."0.2.1";
-      "bower-1.4.1" = self.by-version."bower"."1.4.1";
-      "argparse-0.1.15" = self.by-version."argparse"."0.1.15";
-      "clone-0.1.11" = self.by-version."clone"."0.1.11";
-      "semver-2.3.2" = self.by-version."semver"."2.3.2";
-      "fetch-bower-2.0.0" = self.by-version."fetch-bower"."2.0.0";
+      "fs-extra-0.26.7" = self.by-version."fs-extra"."0.26.7";
+      "lodash-4.2.1" = self.by-version."lodash"."4.2.1";
+      "promised-temp-0.1.0" = self.by-version."promised-temp"."0.1.0";
+      "semver-5.1.0" = self.by-version."semver"."5.1.0";
+      "temp-0.8.3" = self.by-version."temp"."0.8.3";
+      "glob-6.0.4" = self.by-version."glob"."6.0.4";
     };
-    optionalDependencies = {
-    };
-    peerDependencies = [];
-    os = [ ];
-    cpu = [ ];
   };
-  "bower2nix" = self.by-version."bower2nix"."2.1.0";
+  "bower2nix" = self.by-version."bower2nix"."3.0.1";
   by-spec."bplist-parser"."0.0.6" =
     self.by-version."bplist-parser"."0.0.6";
   by-version."bplist-parser"."0.0.6" = self.buildNodePackage {
@@ -14795,32 +14807,6 @@
     os = [ ];
     cpu = [ ];
   };
-  by-spec."fetch-bower"."*" =
-    self.by-version."fetch-bower"."2.0.0";
-  by-version."fetch-bower"."2.0.0" = self.buildNodePackage {
-    name = "fetch-bower-2.0.0";
-    version = "2.0.0";
-    bin = true;
-    src = fetchurl {
-      url = "http://registry.npmjs.org/fetch-bower/-/fetch-bower-2.0.0.tgz";
-      name = "fetch-bower-2.0.0.tgz";
-      sha1 = "c027feb75a512001d1287bbfb3ffaafba67eb92f";
-    };
-    deps = {
-      "bower-endpoint-parser-0.2.1" = self.by-version."bower-endpoint-parser"."0.2.1";
-      "bower-logger-0.2.1" = self.by-version."bower-logger"."0.2.1";
-      "bower-1.4.1" = self.by-version."bower"."1.4.1";
-      "glob-3.2.11" = self.by-version."glob"."3.2.11";
-    };
-    optionalDependencies = {
-    };
-    peerDependencies = [];
-    os = [ ];
-    cpu = [ ];
-  };
-  "fetch-bower" = self.by-version."fetch-bower"."2.0.0";
-  by-spec."fetch-bower".">=2 <3" =
-    self.by-version."fetch-bower"."2.0.0";
   by-spec."fields"."~0.1.22" =
     self.by-version."fields"."0.1.23";
   by-version."fields"."0.1.23" = self.buildNodePackage {
@@ -41997,8 +41983,6 @@
     os = [ ];
     cpu = [ ];
   };
-  by-spec."typescript"."*" =
-    self.by-version."typescript"."1.5.0-alpha";
   by-version."typescript"."1.5.0-alpha" = self.buildNodePackage {
     name = "typescript-1.5.0-alpha";
     version = "1.5.0-alpha";
@@ -42016,7 +42000,28 @@
     os = [ ];
     cpu = [ ];
   };
-  "typescript" = self.by-version."typescript"."1.5.0-alpha";
+  by-version."typescript"."1.8.9" = self.buildNodePackage {
+    name = "typescript-1.8.9";
+    version = "1.8.9";
+    bin = true;
+    src = fetchurl {
+      url = "http://registry.npmjs.org/typescript/-/typescript-1.8.9.tgz";
+      name = "typescript-1.8.9.tgz";
+      sha1 = "b3b3a74059fd31cbd3ecad95d62465939e7ed5fa";
+    };
+    deps = {
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
+  by-spec."typescript"."*" =
+    self.by-version."typescript"."1.8.9";
+  by-spec."typescript"."~1.8.9" =
+    self.by-version."typescript"."1.8.9";
+  "typescript" = self.by-version."typescript"."1.8.9";
   by-spec."typewiselite"."~1.0.0" =
     self.by-version."typewiselite"."1.0.0";
   by-version."typewiselite"."1.0.0" = self.buildNodePackage {
@@ -45517,4 +45522,3917 @@
     os = [ ];
     cpu = [ ];
   };
+  by-spec."ansi-regex"."^2.0.0" =
+    self.by-version."ansi-regex"."2.0.0";
+  by-version."ansi-regex"."2.0.0" = self.buildNodePackage {
+    name = "ansi-regex-2.0.0";
+    version = "2.0.0";
+    bin = false;
+    src = fetchurl {
+      url = "http://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz";
+      name = "ansi-regex-2.0.0.tgz";
+      sha1 = "c5061b6e0ef8a81775e50f5d66151bf6bf371107";
+    };
+    deps = {
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
+  by-spec."ansi-styles"."^2.1.0" =
+    self.by-version."ansi-styles"."2.2.0";
+  by-version."ansi-styles"."2.2.0" = self.buildNodePackage {
+    name = "ansi-styles-2.2.0";
+    version = "2.2.0";
+    bin = false;
+    src = fetchurl {
+      url = "http://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.0.tgz";
+      name = "ansi-styles-2.2.0.tgz";
+      sha1 = "c59191936e6ed1c1315a4b6b6b97f3acfbfa68b0";
+    };
+    deps = {
+      "color-convert-1.0.0" = self.by-version."color-convert"."1.0.0";
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
+  by-spec."argparse"."1.0.4" =
+    self.by-version."argparse"."1.0.4";
+  by-version."argparse"."1.0.4" = self.buildNodePackage {
+    name = "argparse-1.0.4";
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+    };
+    deps = {
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
+  by-spec."yallist"."^2.0.0" =
+    self.by-version."yallist"."2.0.0";
+  by-version."yallist"."2.0.0" = self.buildNodePackage {
+    name = "yallist-2.0.0";
+    version = "2.0.0";
+    bin = false;
+    src = fetchurl {
+      url = "http://registry.npmjs.org/yallist/-/yallist-2.0.0.tgz";
+      name = "yallist-2.0.0.tgz";
+      sha1 = "306c543835f09ee1a4cb23b7bce9ab341c91cdd4";
+    };
+    deps = {
+    };
+    optionalDependencies = {
+    };
+    peerDependencies = [];
+    os = [ ];
+    cpu = [ ];
+  };
 }
diff --git a/pkgs/top-level/node-packages.json b/pkgs/top-level/node-packages.json
index e67aecca695..600ea00b93e 100644
--- a/pkgs/top-level/node-packages.json
+++ b/pkgs/top-level/node-packages.json
@@ -122,7 +122,6 @@
 , "git-run"
 , "bower"
 , "bower2nix"
-, "fetch-bower"
 , "npm-check-updates"
 , "node-stringprep"
 , "ltx"
diff --git a/pkgs/top-level/node-packages.nix b/pkgs/top-level/node-packages.nix
index fca110d2a01..d8eb668107b 100644
--- a/pkgs/top-level/node-packages.nix
+++ b/pkgs/top-level/node-packages.nix
@@ -63,6 +63,12 @@ in rec {
         sha1 = "26220f7e43ee3c0d714860db61c4d0ecc9bb3d89";
       }} ../webdrvr/chromedriver_linux64.zip
     '';
+    bower2nix.buildInputs = [ pkgs.makeWrapper ];
+    bower2nix.postInstall = ''
+      for prog in bower2nix fetch-bower; do
+        wrapProgram "$out/bin/$prog" --prefix PATH : "${pkgs.git}/bin"
+      done
+    '';
   } // args.overrides or {};
 
   # Apply overrides and back compatiblity transformations