=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for musca-0.9.24.tgz
=> Checksum RMD160 OK for musca-0.9.24.tgz
===> Installing dependencies for musca-0.9.24nb1
=> Build dependency x11-links>=0.72: found x11-links-0.74
===> Overriding tools for musca-0.9.24nb1
===> Extracting for musca-0.9.24nb1
===> Patching for musca-0.9.24nb1
=> Applying pkgsrc patches for musca-0.9.24nb1
===> Creating toolchain wrappers for musca-0.9.24nb1
ERROR: zlib>=1.1.4nb1 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/wm/musca
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/wm/musca