%: /n/outside/sys/lib/wiki/% cp $prereq $target d: ; # don't clobber this mkfile update:V: 9fs outside cd /n/outside/sys/lib/wiki x=(* d/*) cd /n/sources/wiki for(i in $x) if(! ~ $i mkfile && ! test -d /n/outside/sys/lib/wiki/$i) mk $i