micwoj92 [1] filed a deletion request for gnumeric-pure [2]:

This module is unsupported upstream and it doesnt compile with
gnumeric 1.12.43 (and higher)
https://github.com/agraef/pure-
lang/commit/887eb3f2877c9a548b0c01370c5314a1380f194a

[1] https://aur.archlinux.org/account/micwoj92/
[2] https://aur.archlinux.org/pkgbase/gnumeric-pure/