Leap 15.4 doesn't support zst compression, for _service's recompress:

[   54s] Running build time source services...
[   70s] ERROR: Unknown compression
[   70s] service run failed for service 'recompress'

TODO:

1. Review spec file to make sure compliance with openSUSE's font packaging guidelines;
2. Review splitting of sub-package for the same font and make sure they make sense;