unknown public key 8F0871F202119294 on ArchLinux
gpg --recv-keys 8F0871F202119294
- the missing key needs to be added to your
USER
keyring
I did not need to trust the key for makepkg
to finish the build.
~/.gnupg/gpg.conf
also needed:
keyserver-options no-honor-keyserver-url
in my particular case
Keys from AUR are not in the keyrings provided by the distributions' repositories.
You will need to find and add the AUR package/upstream keys manually, if you trust them.
Start by checking the PKGBUILD
file of the package, then the comments in the AUR to see where/if to get and add the keys.