=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching micropython-1.5.2.tar.gz
=> Total size: 6673101 bytes
ftp: Error retrieving file `404 Not Found'
fetch: Unable to fetch expected file micropython-1.5.2.tar.gz
=> Checksum SHA1 OK for micropython-1.5.2/micropython-1.5.2.tar.gz
=> Checksum RMD160 OK for micropython-1.5.2/micropython-1.5.2.tar.gz
=> Checksum SHA512 OK for micropython-1.5.2/micropython-1.5.2.tar.gz