is there a hg-download in Guix ?
The version packaged in Fedora is a single commit and then there's a patch in an issue that solves a failure in the tests
The version in pypi is very old (hundreds of commits behind)
This package is a dependency for python-stdnum, that, in turn, is a dependency for one of the Tryton modules (the module for accounting, absolutely fundamental)
How do I solve this ?