=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for xsc-1.5.tar.gz
=> Checksum RMD160 OK for xsc-1.5.tar.gz
===> Installing dependencies for xsc-1.5nb2
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for xsc-1.5nb2
===> Extracting for xsc-1.5nb2
===> Patching for xsc-1.5nb2
=> Applying pkgsrc patches for xsc-1.5nb2
===> Creating toolchain wrappers for xsc-1.5nb2
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

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

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