=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for arpack96.tar.gz
=> Checksum RMD160 OK for arpack96.tar.gz
=> Checksum SHA1 OK for patch.tar.gz
=> Checksum RMD160 OK for patch.tar.gz
===> Installing dependencies for arpack-96
===> Overriding tools for arpack-96
===> Extracting for arpack-96
cd /usr/pkgsrc/work/math/arpack/work &&  -zxf /usr/pkgsrc/distfiles/patch.tar.gz
-zxf: not found
*** Error code 127

Stop.
bmake: stopped in /usr/pkgsrc/math/arpack
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/math/arpack