anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "wlroots";
  -  version = "0.6.0";
  +  version = "0.7.0";
   
     src = fetchFromGitHub {
       owner = "swaywm";
       repo = "wlroots";
       rev = version;
  -    sha256 = "1rdcmll5b8w242n6yfjpsaprq280ck2jmbz46dxndhignxgda7k4";
  +    sha256 = "0jzxa6psbc7ddxli7rbfqxmv1svxnis51l1vch4hb9fdixqm284a";
     };
   
  -  # $out for the library, $bin for rootston, and $examples for the example
  -  # programs (in examples) AND rootston
  -  outputs = [ "out" "bin" "examples" ];
  +  # $out for the library and $examples for the example programs (in examples):
  +  outputs = [ "out" "examples" ];
   
     nativeBuildInputs = [ meson ninja pkgconfig ];
   
  
positive.code:     "-Dxcb-icccm=enabled" "-Dxcb-errors=enabled"
    ];
  
    postPatch = ''
      # It happens from time to time that the version wasn't updated:
      sed -iE "s/version: '[0-9]\.[0-9]\.[0-9]'/version: '${version}.0'/" meson.build
    '';
  
    postInstall = ''
      # Copy the library to $bin and $examples
      for output in "$bin" "$examples"; do
        mkdir -p $output/lib
        cp -P libwlroots* $output/lib/
      done
    '';
  
    postFixup = ''
      # Install rootston (the reference compositor) to $bin and $examples (this
      # has to be done after the fixup phase to prevent broken binaries):
      for output in "$bin" "$examples"; do
        mkdir -p $output/bin
        cp rootston/rootston $output/bin/
        patchelf \
          --set-rpath "$(patchelf --print-rpath $output/bin/rootston | sed s,$out,$output,g)" \
          $output/bin/rootston
        mkdir $output/etc
        cp ../rootston/rootston.ini.example $output/etc/rootston.ini
      done
      # Install ALL example programs to $examples:
      # screencopy dmabuf-capture input-inhibitor layer-shell idle-inhibit idle
      # screenshot output-layout multi-pointer rotation tablet touch pointer
  
negative.code:     cd ./examples
      for binary in $(find . -executable -type f -printf '%P\n' | grep -vE '\.so'); do
        cp "$binary" "$examples/bin/wlroots-$binary"
      done
    '';
  
  