There's a merged pull request on the void-packages repository

farstream: drop unused python-devel in *depends, fix tests.
https://github.com/void-linux/void-packages/pull/38612

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python headers haven't been needed since Farstream 0.2: https://gitlab.freedesktop.org/farstream/farstream/-/commit/73891c28fa27d5e65a71762e826f13747d743588

The tests were already broken prior to this change, but the patch I added gets them building, but then they fail when they run...