Tracked upstream in https://github.com/alastair/python-musicbrainzngs/issues/201
However, this is rather a debian packaging issue than an issue upstream. The internet access is needed for the docs (sphinx/intersphinx) see also https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830186 The solution for debian is to either not build the documentation, which is available online anyways http://python-musicbrainzngs.readthedocs.io/ or patch the documentation build files to either not use intersphinx or to not use the discid mapping. This would be done here: https://github.com/alastair/python-musicbrainzngs/blob/master/docs/conf.py#L99 I am not sure ATM why the python and python2 mappings don't need internet access, but that might also be a debian patch in sphinx or similar. I didn't follow #830186 and related patches closely. Regards JonnyJD PS: It would be technically possible for sphinx to not make any web requests during build when package/class lists are provided in the build files (like for javadoc linkoffline).