anchor.diff:      owner = "swaywm";
       repo = "wlroots";
       rev = version;
  -    sha256 = "0gfxawjlb736xl90zfv3n6zzf5n1cacgzflqi1zq1wn7wd3j6ppv";
  +    sha256 = "1iz5lxpiba1lcmkz3hz56r8j6ra3535zgckazqshi4c364nx94zs";
     };
  -
  -  postPatch = ''
  -    substituteInPlace meson.build \
  -      --replace "version: '0.1.0'" "version: '${version}.0'"
  -  '';
   
     # $out for the library, $bin for rootston, and $examples for the example
     # programs (in examples) AND rootston
  
positive.code:     "-Dlibcap=enabled" "-Dlogind=enabled" "-Dxwayland=enabled" "-Dx11-backend=enabled"
      "-Dxcb-icccm=enabled" "-Dxcb-errors=enabled"
    ];
  
    postInstall = ''
      # Install rootston (the reference compositor) to $bin and $examples
  
negative.code: 
  let
    pname = "wlroots";
    version = "0.3";
  in stdenv.mkDerivation rec {
    name = "${pname}-${version}";
  
  