gpg: error running '/usr/bin/gpg-agent': exit status 2 in workdir

I want to generate my own archlinux.wsl file with my custom config. So I try to build default archlinux.wsl first

sudo scripts/build-image.sh workdir $(date +"%Y.%m.%d")

then I get this gpg error

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
==> Generating pacman master key. This may take some time.
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
gpg: Generating pacman keyring master key...
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: agent_genkey failed: No agent running
gpg: key generation failed: No agent running
gpg: Done
==> Updating trust database...
gpg: no need for a trustdb check
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.
==> Use 'pacman-key --init' to generate a default secret key.

but if I use current directory as $WORKDIR (like archlinux-docker) or use workdir as $WORKDIR in archlinux/archlinux docker image, gpg-agent works.

sudo scripts/build-image.sh . $(date +"%Y.%m.%d")

what setting should I change?