anchor.diff:  
   in stdenv.mkDerivation {
     inherit name src postPatch;
  -  nativeBuildInputs = [ gradle_4_10 perl makeWrapper ];
  +  nativeBuildInputs = [ gradle_6 perl makeWrapper ];
   
     buildPhase = ''
       export GRADLE_USER_HOME=$(mktemp -d)
  
positive.code:   deps = stdenv.mkDerivation {
      name = "${name}-deps";
      inherit src postPatch;
      nativeBuildInputs = [ gradle_4_10 perl ];
      buildPhase = ''
        export GRADLE_USER_HOME=$(mktemp -d)
        gradle --no-daemon build
  
negative.code:     tar xvf build/distributions/mucommander-${version}.tar --directory=$out --strip=1
      wrapProgram $out/bin/mucommander \
        --prefix XDG_DATA_DIRS : ${gsettings-desktop-schemas}/share/gsettings-schemas/${gsettings-desktop-schemas.name} \
        --set JAVA_HOME ${jdk11}
    '';
  
    meta = with stdenv.lib; {
  