=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching stockfish-9-src.zip
=> Total size: 171925 bytes
Certificate verification failed for /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Baltimore CA-2 G2
34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
fetch: https://stockfish.s3.amazonaws.com/stockfish-9-src.zip: Authentication error
fetch: Unable to fetch expected file stockfish-9-src.zip
stockfish-9-src.zip                                      0  B    0  Bps
=> Checksum SHA1 OK for stockfish-9-src.zip
=> Checksum RMD160 OK for stockfish-9-src.zip
=> Checksum SHA512 OK for stockfish-9-src.zip