anchor.diff:  { stdenv
   , fetchFromGitHub
  -, fetchpatch
   , meson
   , ninja
   , vala
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "monitor";
    version = "0.6.1";
  
    src = fetchFromGitHub {
      owner = "stsdc";
      repo = "monitor";
      rev = version;
      sha256 = "17z1m193s7qygavfwd8qsw97blxbfmq9gnsymdjlc1ddk8hldw0z";
    };
  
    nativeBuildInputs = [
  
negative.code:     libwnck3
    ];
  
    postPatch = ''
      chmod +x meson/post_install.py
      patchShebangs meson/post_install.py
  