use macro for /usr/local/plan9
diff --git a/man/man1/label.1 b/man/man1/label.1
index 0caf8d5..20fd900 100644
--- a/man/man1/label.1
+++ b/man/man1/label.1
@@ -57,9 +57,9 @@
 }
 .EE
 .SH SOURCE
-.B /usr/local/plan9/bin/label
+.B \*9/bin/label
 .br
-.B /usr/local/plan9/bin/awd
+.B \*9/bin/awd
 .SH BUGS
 .I Awd
 is also documented in