anchor.diff:  , readline
   , sqlite
   , util-linux_lib
  +, which
   , zlib
   }:
   
   let
  +  inherit (stdenv.lib)
  +    concatStringsSep;
  +
  +  mountPath = [
  +    attr
  +    coreutils
  +    gawk
  +    gnugrep
  +    gnused
  +    which
  +  ];
  +
     versionMajor = "3.9";
     versionMinor = "0";
     version = "${versionMajor}.${versionMinor}";
  
positive.code:     # that doesn't exist
      grep -q '\-lgfchangedb' $out/lib/pkgconfig/libgfdb.pc
      sed -i 's, -lgfchangedb,,g' $out/lib/pkgconfig/libgfdb.pc
    '';
  
    meta = with stdenv.lib; {
  
negative.code:   nativeBuildInputs = [
      bison
      flex
      makeWrapper
      python
    ];
  
  