=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching racket-minimal-6.4-src.tgz
=> Total size: 6327969 bytes
ftp: Error retrieving file `404 Not Found'
fetch: Unable to fetch expected file racket-minimal-6.4-src.tgz
=> Checksum SHA1 OK for racket-minimal-6.4-src.tgz
=> Checksum RMD160 OK for racket-minimal-6.4-src.tgz
=> Checksum SHA512 OK for racket-minimal-6.4-src.tgz