=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching wkhtmltox-0.12.4.tar.bz2
=> Total size: 36355721 bytes
Certificate verification failed for /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 Extended Validation Server CA
34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
fetch: https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4.tar.bz2: Authentication error
fetch: Unable to fetch expected file wkhtmltox-0.12.4.tar.bz2
wkhtmltox-0.12.4.tar.bz2                                 0  B    0  Bps
=> Checksum SHA1 OK for wkhtmltox-0.12.4.tar.bz2
=> Checksum RMD160 OK for wkhtmltox-0.12.4.tar.bz2
=> Checksum SHA512 OK for wkhtmltox-0.12.4.tar.bz2