anchor.diff: -{ stdenv, fetchgit, php }:
  +{ stdenv, fetchgit, php, makeWrapper }:
   
   let
     libphutil = fetchgit {
  
positive.code:   version = "20140530";
  
    src = [ arcanist libphutil ];
    buildInputs = [ php ];
  
    unpackPhase = "true";
    buildPhase = "true";
  
negative.code:     cp -R ${arcanist}  $out/libexec/arcanist
  
      ln -s $out/libexec/arcanist/bin/arc $out/bin
  
      wrapProgram $out/bin/arc \
        --prefix PATH : "${php}/bin"
    '';
  
    meta = {
  