=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for xrdb-1.0.9.tar.bz2
=> Checksum RMD160 OK for xrdb-1.0.9.tar.bz2
===> Installing dependencies for xrdb-1.0.9
=> Tool dependency pkg-config>=0.25: found pkg-config-0.28
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for xrdb-1.0.9
===> Extracting for xrdb-1.0.9
===> Patching for xrdb-1.0.9
===> Creating toolchain wrappers for xrdb-1.0.9
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/xrdb
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/x11/xrdb