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