=> Bootstrap dependency digest>=20010302: found digest-20190127 => Fetching po4a-0.56.tar.gz => Total size: 2994792 bytes ftp: Error retrieving file `503 Backend unavailable, connection failed' fetch: Unable to fetch expected file po4a-0.56.tar.gz => Checksum SHA1 OK for po4a-0.56.tar.gz => Checksum RMD160 OK for po4a-0.56.tar.gz => Checksum SHA512 OK for po4a-0.56.tar.gz