Hi, Note that I haven't tested this patch with the latest code because of this error [1]. But the build succeeded in the other repo. Also, should we explictly mention the licenses for third-party software incorporated in the Python distribution [2]? Nikita [1] https://lists.gnu.org/archive/html/bug-guix/2013-01/msg00139.html [2] http://docs.python.org/2/license.html#licenses-and-acknowledgements-for-incorporated-software