=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for xclip-0.11.tar.gz
=> Checksum RMD160 OK for xclip-0.11.tar.gz
===> Installing dependencies for xclip-0.11
=> Tool dependency gmake>=3.81: found gmake-3.82nb6
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for xclip-0.11
===> Extracting for xclip-0.11
===> Patching for xclip-0.11
===> Creating toolchain wrappers for xclip-0.11
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

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

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