=> Bootstrap dependency digest>=20211023: found digest-20220214
=> Fetching Gauche-0.9.15.tgz
=> Total size: 9444756 bytes
ftp: Error retrieving file `404 Not Found'
fetch: Unable to fetch expected file Gauche-0.9.15.tgz
=> Checksum BLAKE2s OK for Gauche-0.9.15.tgz
=> Checksum SHA512 OK for Gauche-0.9.15.tgz
=> Checksum BLAKE2s OK for Gauche-0.9.15.tgz
=> Checksum SHA512 OK for Gauche-0.9.15.tgz