=> Bootstrap dependency digest>=20010302: found digest-20160304 => Fetching WordNet-3.0.tar.gz => Total size: 11537239 bytes Certificate verification failed for /C=SE/O=AddTrust AB/OU=AddTrust External TTP Network/CN=AddTrust External CA Root 34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269: fetch: http://wordnet.princeton.edu/3.0/WordNet-3.0.tar.gz: Authentication error fetch: Unable to fetch expected file WordNet-3.0.tar.gz fetch: ftp://ftp.cogsci.princeton.edu/pub/wordnet/3.0/WordNet-3.0.tar.gz: No address record fetch: Unable to fetch expected file WordNet-3.0.tar.gz WordNet-3.0.tar.gz 0 B 0 Bps => Fetching wordnet.patch.2 => Total size: 23878 bytes wordnet.patch.2 0 B 0 Bps => Checksum SHA1 OK for WordNet-3.0.tar.gz => Checksum RMD160 OK for WordNet-3.0.tar.gz => Checksum SHA512 OK for WordNet-3.0.tar.gz => Checksum SHA1 OK for wordnet.patch.2 => Checksum RMD160 OK for wordnet.patch.2 => Checksum SHA512 OK for wordnet.patch.2