anchor.diff:        export PATH
         echo $name loaded
       EOF
  +    exit 0
     '';
   }
  
positive.code:   # the buildNativeInputs environment variable.
    buildNativeInputs = [ ] ++ buildInputs ;
    name = "env-${name}";
    phases = "buildPhase";
    setupNew = substituteAll {
      src = ../../stdenv/generic/setup.sh;
      preHook="";
  
negative.code:     initialPath= (import ../../stdenv/common-path.nix) { inherit pkgs; };
      gcc = stdenv.gcc;
    };
  
    buildPhase = ''
      set -x
      mkdir -p "$out/dev-envs" "$out/nix-support"
  