=> Bootstrap dependency digest>=20010302: found digest-20121220
===> 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'.
=> Checksum SHA1 OK for optipng-0.7.4.tar.gz
=> Checksum RMD160 OK for optipng-0.7.4.tar.gz
===> Installing dependencies for optipng-0.7.4nb1
=> Full dependency png>=1.6.0nb1: found png-1.6.1
===> Overriding tools for optipng-0.7.4nb1
===> Extracting for optipng-0.7.4nb1
===> Patching for optipng-0.7.4nb1
=> Applying pkgsrc patches for optipng-0.7.4nb1
===> Creating toolchain wrappers for optipng-0.7.4nb1
===> Configuring for optipng-0.7.4nb1
Checking for gcc...
Checking for system libpng...
Checking for system zlib...