=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Fetching audiotools-3.1.1.tar.gz
=> Total size: 6325408 bytes
ftp: Error retrieving file `503 Backend unavailable, connection failed'
fetch: Unable to fetch expected file audiotools-3.1.1.tar.gz
=> Checksum SHA1 OK for audiotools-3.1.1.tar.gz
=> Checksum RMD160 OK for audiotools-3.1.1.tar.gz
=> Checksum SHA512 OK for audiotools-3.1.1.tar.gz