Hi am trying to add repository in snapcraft.yaml like below but it failing with errors:
ppa: plugin: nil override-pull: | apt --yes install software-properties-common apt-utils add-apt-repository -yu ppa:mc3man/mpv-tests
failing with build error:
[04/Aug/2019:10:37:38 +0000] "CONNECT launchpad.net:443 HTTP/1.0" 200 9202 "-" "-" [04/Aug/2019:10:37:38 +0000] "CONNECT launchpad.net:443 HTTP/1.0" 200 9180 "-" "-" gpg: keyring `/tmp/tmp9jcf1xer/secring.gpg' created gpg: keyring `/tmp/tmp9jcf1xer/pubring.gpg' created gpg: requesting key ED8E640A from hkp server keyserver.ubuntu.com [04/Aug/2019:10:37:38 +0000] "GET http://keyserver.ubuntu.com:80/pks/lookup?op=get&options=mr&search=0x8E51A6D660CD88D67D65221D90BD7EACED8E640A HTTP/1.0" 403 1919 "-" "-" gpg: no valid OpenPGP data found. gpg: Total number processed: 0 gpg: keyserver communications error: keyserver helper general error gpg: keyserver communications error: unknown pubkey algorithm gpg: keyserver receive failed: unknown pubkey algorithm gpgkeys: key 8E51A6D660CD88D67D65221D90BD7EACED8E640A can't be retrieved Failed to add key. Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Downloading parts list Failed to run 'override-pull': Exit code was 1. Build failed
Any help will be appreciated 
