anchor.diff:    # the buildNativeInputs environment variable.
     buildNativeInputs = [ ] ++ buildInputs ;
     name = "env-${name}";
  -  phases = "buildPhase";
  +  phases = [ "buildPhase" ];
     setupNew = substituteAll {
       src = ../../stdenv/generic/setup.sh;
       preHook="";
  
positive.code:       export PATH
        echo $name loaded
      EOF
    '';
  }
  
negative.code:     initialPath= (import ../../stdenv/common-path.nix) { inherit pkgs; };
      gcc = stdenv.gcc;
    };
  
    buildPhase = ''
      set -x
      mkdir -p "$out/dev-envs" "$out/nix-support"
  