anchor.diff:  { lib
   , stdenv
   , fetchFromGitLab
  -, fetchpatch
   , writeText
   , cmake
   , doxygen
  
positive.code:     license = licenses.boost;
      maintainers = with maintainers; [ expipiplus1 prusnak ];
      platforms = platforms.linux;
    };
  }
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "monado";
    version = "unstable-2022-05-28";
  
    src = fetchFromGitLab {
      domain = "gitlab.freedesktop.org";
      owner = "monado";
      repo = "monado";
      rev = "011bcbdcff227e25507e5f2d81a83a2bbe478856";
      sha256 = "sha256-8velNKSCZJtKO8ATwXDl1nU8RbxZ8TeyGiUQFOXifuI=";
    };
  
    nativeBuildInputs = [
      cmake
  