bug#43264: Verifying guile-3.0.4.tar.gz fails

gpg: Signature made Mi 24 Jun 16:29:25 2020 CEST
gpg:                using RSA key 3CE464558A84FDC69DB40CFB090B11993D9AEBB5
gpg: no running Dirmngr - starting '/usr/local/gnupg-2.2/bin/dirmngr'
gpg: waiting for the dirmngr to come up ... (5s)
gpg: connection to dirmngr established
gpg: Can't check signature: No public key


--
Greetings

  Pete

Well begun is half done.
			– Optimist.
Half done is well begun.
			– Realist.
Half begun is well done.
			– Australian.