MarsSeed [1] filed a deletion request for spidermonkey [2]: I suggest this abandoned legacy package can be deleted. Last updated in 2017. SpiderMonkey (released as LTS versions) is carried by Arch as: - https://archlinux.org/packages/extra/x86_64/js78/ - https://archlinux.org/packages/extra/x86_64/js91/ There is only 1 optional dependent (consumer): - AUR/python-pyexecjs. (Which is itself a legacy deprecated library from 2018). Safe to delete. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/spidermonkey/