
To obtain the original sources you have to do the following:

1. Install mercurial.
2. hg clone http://hg.netbeans.org/main/nb-javac/
3. hg archive -t tgz -r 22d3043bc53f ../libnb-javaparser-java_9+2018.orig.tar.gz

Then repack the tarball and remove prebuilt jar and class files.

