anchor.diff:  { stdenv
  -, fetchurl
   , makeWrapper
   , fetchFromGitHub
   , gradle_5
   , perl
   , jre
  -, xorg
  -, openal
  +, libpulseaudio
   }:
   
   let
     pname = "shattered-pixel-dungeon";
  -  version = "0.7.5f";
  +  version = "0.8.0b";
   
     src = fetchFromGitHub {
       owner = "00-Evan";
  -    repo = "shattered-pixel-dungeon-gdx";
  +    repo = "shattered-pixel-dungeon";
       rev = "v${version}";
  -    sha256 = "05awbbc7np9li50shdbpv9dgdgry6lra8d5gibwn578m2g9srbxx";
  +    sha256 = "1qi90qw2xp56wai4gn39rpwh3gs3kx2zcpbni861f7hl9hnf87bf";
     };
   
     postPatch = ''
       # disable gradle plugins with native code and their targets
       perl -i.bak1 -pe "s#(^\s*id '.+' version '.+'$)#// \1#" build.gradle
       perl -i.bak2 -pe "s#(.*)#// \1# if /^(buildscript|task portable|task nsis|task proguard|task tgz|task\(afterEclipseImport\)|launch4j|macAppBundle|buildRpm|buildDeb|shadowJar)/ ... /^}/" build.gradle
  +    # Remove unbuildable android stuff
  +    rm android/build.gradle
     '';
   
     # fake build to pre-download deps into fixed-output derivation
  
positive.code:     '';
      outputHashAlgo = "sha256";
      outputHashMode = "recursive";
      outputHash = "1k0v5scadw9ziq4dw2rckmh8x2xlmxslfsxmpw79zg78n3hvwhf1";
    };
  
  in stdenv.mkDerivation rec {
  
negative.code:   buildPhase = ''
      export GRADLE_USER_HOME=$(mktemp -d)
      # point to offline repo
      sed -ie "s#repositories {#repositories { maven { url '${deps}' };#g" build.gradle
      gradle --offline --no-daemon desktop:release
    '';
  
    installPhase = ''
      install -Dm644 desktop/build/libs/desktop-${version}.jar $out/share/shattered-pixel-dungeon.jar
      mkdir $out/bin
      makeWrapper ${jre}/bin/java $out/bin/shattered-pixel-dungeon \
        --prefix LD_LIBRARY_PATH : ${libpulseaudio}/lib \
        --add-flags "-jar $out/share/shattered-pixel-dungeon.jar"
    '';
  
    meta = with stdenv.lib; {
      homepage = "https://shatteredpixel.com/";
      downloadPage = "https://github.com/00-Evan/shattered-pixel-dungeon/releases";
      description = "Traditional roguelike game with pixel-art graphics and simple interface";
      license = licenses.gpl3;
      maintainers = with maintainers; [ fgaz ];
  