=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching nhc98src-1.22.tar.gz
=> Total size: 29854160 bytes
Certificate verification failed for /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
fetch: http://www.haskell.org/nhc98/nhc98src-1.22.tar.gz: Authentication error
fetch: Unable to fetch expected file nhc98src-1.22.tar.gz
nhc98src-1.22.tar.gz                                     0  B    0  Bps
=> Checksum SHA1 OK for nhc98src-1.22.tar.gz
=> Checksum RMD160 OK for nhc98src-1.22.tar.gz
=> Checksum SHA512 OK for nhc98src-1.22.tar.gz