// and test commands:
//
//	-C dir
//		Change to dir before running the command.
//		Any files named on the command line are interpreted after
//		changing directories.
//		If used, this flag must be the first one in the command line.
//	-a
//		force rebuilding of packages that are already up-to-date.
//	-n
//		print the commands but do not run them.
//	-p n