anchor.diff:    buildCommand = ''
       mkdir -p $out/bin $out/share/java
       cp -v $src $out/share/java/gpsprune.jar
  -    makeWrapper ${jre8}/bin/java $out/bin/gpsprune \
  +    makeWrapper ${jdk11}/bin/java $out/bin/gpsprune \
         --add-flags "-jar $out/share/java/gpsprune.jar"
       mkdir -p $out/share/applications
       cp $desktopItem/share/applications"/"* $out/share/applications
  
positive.code: 
    meta = with stdenv.lib; {
      description = "Application for viewing, editing and converting GPS coordinate data";
      homepage = https://activityworkshop.net/software/gpsprune/;
      license = licenses.gpl2Plus;
      maintainers = [ maintainers.rycee ];
      platforms = platforms.all;
  
negative.code: { fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, jdk11 }:
  
  stdenv.mkDerivation rec {
    pname = "gpsprune";
    version = "20";
  
    src = fetchurl {
      url = "https://activityworkshop.net/software/gpsprune/gpsprune_${version}.jar";
      sha256 = "1i9p6h98azgradrrkcwx18zwz4c6zkxp4bfykpa2imi1z3ry5q2b";
    };
  
    nativeBuildInputs = [ makeWrapper ];
    buildInputs = [ jdk11 ];
  
    desktopItem = makeDesktopItem {
      name = "gpsprune";
  