Plan 9 from Bell Labs’s /usr/web/sources/contrib/axel/rushhour/src/mkfile
</$objtype/mkfile BIN=/$objtype/bin/games TARG=rushhour OFILES=\ rushhour.$O\ graphics.$O\ level.$O\ move.$O\ HFILES=rushhour.h\ UPDATE=\ mkfile\ $HFILES\ ${OFILES:%.$O=%.c}\ `{ls /sys/games/lib/rushhour/*} </sys/src/cmd/mkone