installing from binary

Hello, I complied some ports on a PowerMac and I would like to reuse the binary packages on my PowerBook. I copied the binaries to the corresponding directory under /opt/local/ var and I tried port -b install tetex but something went wrong because I got error messages : cernvpn02-n028:~ root# port -b install tetex ---> Unpacking tgz archive for teTeX 3.0_4 Error: Target com.apple.unarchive returned: error copying "/opt/local/ var/db/dports/build/ _opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dp orts_print_teTeX/work/destroot/+STATE": no such file or directory Error: Status 1 encountered during processing. How can I reuse the binary packages? Regards, Zoltan