anchor.diff:  
       mkdir -p $out/bin
       makeWrapper $lib/main.sh $out/bin/${pname} \
  -      --prefix PATH : '${makeBinPath [ coreutils gawk gnugrep gnused jq nix ]}'
  +      --prefix PATH : '${stdenv.lib.makeBinPath [ coreutils gawk gnugrep gnused jq nix ]}'
   
       substitute src/tests.sh $lib/tests.sh \
         --subst-var-by bin $out/bin
  
positive.code: , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxml2, libxslt
  , coreutils, gawk, gnugrep, gnused, jq, nix }:
  
  with stdenv.lib;
  
  stdenv.mkDerivation rec {
    pname = "nix-prefetch";
    version = "0.1.0";
  
    src = fetchFromGitHub {
      owner = "msteen";
      repo = "nix-prefetch";
      rev = "f9507a655651b51f3a3ebacde85bb40758853615";
      sha256 = "0ykrbvbwwpz348424yy2452idgw8dffi3klh7n85n96dfflyyd4s";
    };
  
    nativeBuildInputs = [
  
negative.code:     install -D contrib/nix-prefetch-completion.bash $out/share/bash-completion/completions/nix-prefetch
      install -D contrib/nix-prefetch-completion.zsh $out/share/zsh/site-functions/_nix_prefetch
  
      mkdir -p $out/share/doc/${pname}/contrib
      cp -r contrib/hello_rs $out/share/doc/${pname}/contrib/
    '';
  
    meta = with stdenv.lib; {
      description = "Prefetch any fetcher function call, e.g. package sources";
      homepage = "https://github.com/msteen/nix-prefetch";
      license = licenses.mit;
      maintainers = with maintainers; [ msteen ];
      platforms = platforms.all;
  