=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for xbl-1.1.6.tar.gz
=> Checksum RMD160 OK for xbl-1.1.6.tar.gz
===> Installing dependencies for xbl-1.1.6nb1
=> Tool dependency imake-[0-9]*: found imake-1.0.5
=> Tool dependency imake-[0-9]*: found imake-1.0.5
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for xbl-1.1.6nb1
===> Extracting for xbl-1.1.6nb1
===> Patching for xbl-1.1.6nb1
=> Applying pkgsrc patches for xbl-1.1.6nb1
===> Creating toolchain wrappers for xbl-1.1.6nb1
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/games/xblockout
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/games/xblockout