==> Synchronizing chroot copy [/data/alhp-workspace/chroot/root] -> [build_d83a996e-05dc-48c1-8f15-370989b12632]...done
==> Making package: matrix-synapse 1.74.0-1.1 (Mon Jan  9 11:52:05 2023)
==> Retrieving sources...
  -> Cloning matrix-synapse git repo...
Cloning into bare repository '/data/alhp-workspace/build/x86-64-v2/matrix-synapse-1.74.0-1/matrix-synapse'...
  -> Found generic_worker.yaml.example
  -> Found synapse.service
  -> Found synapse.target
  -> Found synapse-worker@.service
  -> Found sysusers-synapse.conf
  -> Found tmpfiles-synapse.conf
  -> Found override-hardened.conf
==> Validating source files with sha256sums...
    matrix-synapse ... Skipped
    generic_worker.yaml.example ... Passed
    synapse.service ... Passed
    synapse.target ... Passed
    synapse-worker@.service ... Passed
    sysusers-synapse.conf ... Passed
    tmpfiles-synapse.conf ... Passed
    override-hardened.conf ... Passed
==> Verifying source file signatures with gpg...
    matrix-synapse git repo ... FAILED (unknown public key FBCE0ACE0732186F)
==> ERROR: One or more PGP signatures could not be verified!
==> ERROR: Could not download sources.