anchor.diff:  in
   stdenv.mkDerivation rec {
     pname = "cardboard";
  -  version = "0.0.0-unstable=2021-01-21";
  +  version = "0.0.0+unstable=2021-05-10";
   
     src = fetchFromGitLab {
       owner = "cardboardwm";
       repo = pname;
  -    rev = "f2ef2ff076ddbbd23994553b8eff131f9bd0207f";
  -    hash = "sha256-43aqAWk4QoIP0BpRyPRDWFtVh/1UbrBoEeTDEF2gZX4=";
  +    rev = "b54758d85164fb19468f5ca52588ebea576cd027";
  +    hash = "sha256-Kn5NyQSDyX7/nn2bKZPnsuepkoppi5XIkdu7IDy5r4w=";
     };
   
     nativeBuildInputs = [
       meson
       ninja
  +    pandoc
       pkg-config
       unzip
     ];
  
positive.code: , mesa
  , meson
  , ninja
  , pixman
  , pkg-config
  , unzip
  
negative.code: 
    # "Inherited" from Nixpkgs expression for wlroots
    mesonFlags = [
      "-Dman=true"
      "-Dwlroots:logind-provider=systemd"
      "-Dwlroots:libseat=disabled"
    ];
  