anchor.diff:      profiledCompiler = true;
     });
   
  +  /* doesn't work yet
  +
     # This new ghc stuff is under heavy development and might change ! 
   
     # usage: see ghcPkgUtil.sh - use setup-new2 because of PATH_DELIMITER
  
positive.code:         # (flatten ghcsAndLibs.ghc68.core_libs);
        inherit ghc;
    };
  
    # ghc66boot = import ../development/compilers/ghc-6.6-boot {
    #  inherit fetchurl stdenv perl readline;
  
negative.code:     ghc : let
      deriv = name : goSrcDir : deps : 
        let bd = builderDefs {
            goSrcDir = "ghc-* /libraries";
            src = ghc.extra_src;
          } null; in
        stdenv.mkDerivation rec {
  