Reminds of the note at the bottom of Fish releases. It's there because the build system cannot determine the current version for some reason. Hopefully that will go away now that they have switched to a different language / build system. The custom tarball is used by Arch Linux at the very least.
https://github.com/fish-shell/fish-shell/releases/tag/3.7.1
https://github.com/fish-shell/fish-shell/issues/7772#issueco...
https://gitlab.archlinux.org/archlinux/packaging/packages/fi...