=> Bootstrap dependency digest>=20010302: found digest-20121220
===> Skipping vulnerability checks.
WARNING: No /var/db/pkg/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /var/db/pkg fetch-pkg-vulnerabilities'.
=> Checksum SHA1 OK for chessbooks/medium.zip
=> Checksum RMD160 OK for chessbooks/medium.zip
===> Installing dependencies for gnuchess-book-medium-20000511nb3
=> Full dependency gnuchess>=5.07: found gnuchess-5.07nb4
===> Overriding tools for gnuchess-book-medium-20000511nb3
===> Extracting for gnuchess-book-medium-20000511nb3
unzip: book.txt may be corrupted due to weak text file detection heuristic
===> Patching for gnuchess-book-medium-20000511nb3
===> Creating toolchain wrappers for gnuchess-book-medium-20000511nb3