anchor.diff:          inherit src patches;
           nativeBuildInputs = [ jdk maven ];
           buildPhase = ''
  -            while mvn package -Dmaven.repo.local=$out/.m2 -Dmaven.wagon.rto=5000; [ $? = 1 ]; do
  +            while ! mvn package "-Dmaven.repo.local=$out/.m2" -Dmaven.wagon.rto=5000; do
                   echo "timeout, restart maven to continue downloading"
               done
           '';
           # keep only *.{pom,jar,sha1,nbm} and delete all ephemeral files with lastModified timestamps inside
  -        installPhase = ''find $out/.m2 -type f -regex '.+\(\.lastUpdated\|resolver-status\.properties\|_remote\.repositories\)' -delete'';
  +        installPhase = ''
  +            find "$out/.m2" -type f \
  +                -regex '.+\(\.lastUpdated\|resolver-status\.properties\|_remote\.repositories\)' \
  +                -delete
  +        '';
           outputHashAlgo = "sha256";
           outputHashMode = "recursive";
           outputHash = "15bbi7z9v601all9vr2azh8nk8rpz2vd91yvvw8id6birnbhn3if";
  
positive.code:     nativeBuildInputs = [ jdk maven makeWrapper ];
  
      buildPhase = ''
          mvn package --offline -Dmaven.repo.local=$( \
              cp -dpR ${deps}/.m2 ./ && \
              chmod +w -R .m2 && \
              pwd \
          )/.m2
      '';
  
      installPhase = ''
          mkdir -p $out/lib/java $out/share/java
          cp -R target/apidocs $out/doc
          cp target/gp.jar $out/share/java
          makeWrapper ${jre_headless}/bin/java $out/bin/gp \
              --add-flags "-jar $out/share/java/gp.jar" \
              --prefix LD_LIBRARY_PATH : "${pcsclite.out}/lib"
      '';
  
  
negative.code:         sha256 = "0rk81x2y7vx1caxm6wa59fjrfxmjn7s8yxaxm764p8m2qxk3m4y2";
      };
  
      # This patch hardcodes the return of a git command the build system tries to
      # run. As `fetchFromGitHub` doesn't fetch a full-fledged git repository,
      # this command can only fail at build-time. As a consequence, we include the
      # `describeVersion` variable defined above here.
      patches = [ (writeText "${name}-version.patch" ''
          diff --git a/pom.xml b/pom.xml
          index 1e5a82d..1aa01fe 100644
  