Warsow engine is free software and the assets are mostly CC-Share-Alike
except 3 files:

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Exceptions:
The assets found within the following archives:
- basewsw/data0_000_nonfree_21.pk3
- basewsw/data0_000_nonfree_21pure.pk3
- basewsw/tex_000_nonfree.pk3
are licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nd/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
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Does it make Warsow unfit for Guix?

-- 
Pierre Neidhardt
https://ambrevar.xyz/