=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Skipping vulnerability checks.
WARNING: No /var/db/pkg/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /var/db/pkg fetch-pkg-vulnerabilities'.
=> Fetching wkhtmltox-0.12.4.tar.bz2
=> Total size: 36355721 bytes
ftp: Error retrieving file `404 Not Found'
fetch: Unable to fetch expected file wkhtmltox-0.12.4.tar.bz2

ftp: transfer aborted because stalled for 11 sec.
checksum: Checksum SHA1 mismatch for wkhtmltox-0.12.4.tar.bz2
fetch: Checksum of the file wkhtmltox-0.12.4.tar.bz2 doesn't match.
=> 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
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (60) SSL certificate problem: certificate has expired
More details here: https://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
=> 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