-use Cwd qw/cwd abs_path/;
-use File::Spec::Functions qw/canonpath catdir splitdir abs2rel/;
-use POSIX qw/WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG SIGINT SIGQUIT/;
+use Cwd (); # cwd, abs_path
+use File::Spec (); # canonpath, catdir, splitdir, abs2rel
+use POSIX qw/WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG SIGINT SIGQUIT/;