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

shutils/show.sh: never show self deps for depends
https://github.com/void-linux/void-packages/pull/27577

Description:
xbps-src always ignore self deps in depends and in hostmakedepends
when not cross compiling. The old behaviour did only check for cross.
This now also ignores them in makedepends, but they are either way
disallowed in there, and returning an error would be correct, but
./xbps-src show-* is and never was suitable for linting, so ignore for now.