gpg error on arch linux

[wohltat]

I also try to use appimage-builder from on arch/manjaro but it fails with the error:

INFO:main:Running main script
INFO:main:Running pacman deploy
INFO:pacman:Using system keyrings
gpg: starting migration from earlier GnuPG versions
gpg: error running '/usr/bin/gpg-agent': exit status 2
gpg: failed to start gpg-agent '/usr/bin/gpg-agent': General error
gpg: can't connect to the gpg-agent: General error
gpg: error: GnuPG agent unusable. Please check that a GnuPG agent can be started.
gpg: migration aborted
...
==> ERROR: There is no secret key available to sign with.
...

I used the pip version of appimage-builder.

There seems to be a similar error been documented before:
#309 (comment)