FYI the permissions on some of the files on sources stop the contrib system from accessing your packages:
felix% contrib/install nemo/tags grep: can't open /n/sources/contrib/nemo/replica/tags/db: '/n/sources/contrib/nemo/replica/tags/db' permission denied fcp: can't open /n/sources/contrib/nemo/replica/tags/log: '/n/sources/contrib/nemo/replica/tags/log' permission denied fcp /n/sources/contrib/nemo/replica/tags/log /dist/replica/client/tags.log: fcp 39229: errors felix% ls -l /n/sources/contrib/nemo/replica/tags --rw-r----- M 16471 nemo sys 1148 Jan 16 11:44 /n/sources/contrib/nemo/replica/tags/db --rw-rw-r-- M 16471 nemo sys 0 Jan 15 15:25 /n/sources/contrib/nemo/replica/tags/dep --rw-rw-r-- M 16471 nemo sys 39 Jan 15 15:25 /n/sources/contrib/nemo/replica/tags/inf --rw-r----- M 16471 nemo sys 3126 Jan 16 11:44 /n/sources/contrib/nemo/replica/tags/log -Steve