anchor.diff:  x@{builderDefsPackage
  -  , foomatic_filters, bc, unzip, ghostscript
  +  , foomatic_filters, bc, unzip, ghostscript, udev, vim
     , ...}:
   builderDefsPackage
   (a :  
  
positive.code:   inherit (sourceInfo) name version;
    inherit buildInputs;
  
    phaseNames = ["fixMakefile" "doMakeInstall" "deployGetWeb"];
    makeFlags = [
      ''PREFIX=$out/''
      ''UDEVBIN=$out/bin/''
    ];
    fixMakefile = a.fullDepEntry ''
      touch all-test
      sed -e "/BASENAME=/iPATH=$out/bin:$PATH" -i *-wrapper *-wrapper.in
    '' ["doUnpack" "minInit"];
  
    deployGetWeb = a.fullDepEntry ''
      ensureDir "$out/bin"
  
negative.code:     (builtins.attrNames (builtins.removeAttrs x helperArgNames));
    sourceInfo = rec {
      baseName="foo2zjs";
      version="20110210";
      name="${baseName}-${version}";
      url="http://www.loegria.net/mirrors/foo2zjs/${name}.tar.gz";
      hash="0vss8gdbbgxr694xw48rys2qflbnb4sp4gdb1v6z4m9ab97hs5yk";
    };
  in
  rec {
  