=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for xworld-2.0.tar.gz
=> Checksum RMD160 OK for xworld-2.0.tar.gz
===> Installing dependencies for xworld-2.0nb3
=> Tool dependency tcsh-[0-9]*: found tcsh-6.18.01nb4
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for xworld-2.0nb3
===> Extracting for xworld-2.0nb3
===> Patching for xworld-2.0nb3
=> Applying pkgsrc patches for xworld-2.0nb3
===> Creating toolchain wrappers for xworld-2.0nb3
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

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

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