anchor.diff:  , mesa
   , meson
   , ninja
  +, pandoc
   , pixman
   , pkg-config
   , unzip
  
positive.code: 
    # "Inherited" from Nixpkgs expression for wlroots
    mesonFlags = [
      "-Dwlroots:logind-provider=systemd"
      "-Dwlroots:libseat=disabled"
    ];
  
negative.code: in
  stdenv.mkDerivation rec {
    pname = "cardboard";
    version = "0.0.0+unstable=2021-05-10";
  
    src = fetchFromGitLab {
      owner = "cardboardwm";
      repo = pname;
      rev = "b54758d85164fb19468f5ca52588ebea576cd027";
      hash = "sha256-Kn5NyQSDyX7/nn2bKZPnsuepkoppi5XIkdu7IDy5r4w=";
    };
  
    nativeBuildInputs = [
      meson
      ninja
      pandoc
      pkg-config
      unzip
    ];
  