=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Fetching open4-1.3.4.gem
=> Total size: 18944 bytes
=> Checksum SHA1 OK for open4-1.3.4.gem
=> Checksum RMD160 OK for open4-1.3.4.gem
=> Checksum SHA512 OK for open4-1.3.4.gem