=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for bbmail-0.8.3.tar.gz
=> Checksum RMD160 OK for bbmail-0.8.3.tar.gz
===> Installing dependencies for bbmail-0.8.3nb1
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for bbmail-0.8.3nb1
===> Extracting for bbmail-0.8.3nb1
===> Patching for bbmail-0.8.3nb1
===> Creating toolchain wrappers for bbmail-0.8.3nb1
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/mail/bbmail
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/mail/bbmail