anchor.diff:  
       configurePhase = ''
         runHook preConfigure
  -      cp ${bootstrapCompiler}/bin/nim bin/
         echo 'define:nixbuild' >> config/nim.cfg
         runHook postConfigure
       '';
  
positive.code:       ln -sf $out/nim/bin/nim $out/bin/nim
        ln -sf $out/nim/lib $out/lib
        ./install.sh $out
        runHook postInstall
      '';
  
  
negative.code: 
    nimHost = parsePlatform stdenv.hostPlatform;
    nimTarget = parsePlatform stdenv.targetPlatform;
  in {
  
    nim-unwrapped = stdenv.mkDerivation rec {
      pname = "nim-unwrapped";
      version = "1.6.8";
      strictDeps = true;
  
      src = fetchurl {
        url = "https://nim-lang.org/download/nim-${version}.tar.xz";
        hash = "sha256-D1tlzbYPeK9BywdcI4mDaJoeH34lyBnxeYYsGKSEz1c=";
      };
  
      buildInputs = [ boehmgc openssl pcre readline sqlite ];
  