I hope I haven't missed the point, but what about this sorta thing in bsd.own.mk? REALBSDSRCDIR!= cd $(BSDSRCDIR) ; pwd # For sym-links __INVKDIR= $(.CURDIR)/ .if $(__INVKDIR:N$(REALBSDSRCDIR)/*) == "" USETOOLS?= yes .endif Chris <jepeway@blasted-heath.com>.