Index: bsd.port.mk
===================================================================
--- bsd.port.mk	(revision 315287)
+++ bsd.port.mk	(working copy)
@@ -1525,7 +1525,7 @@
 
 # You can force skipping these test by defining IGNORE_PATH_CHECKS
 .if !defined(IGNORE_PATH_CHECKS)
-.if (${PREFIX:C,(^.).*,\1,} != "/")
+.if ${PREFIX:N/*}
 .BEGIN:
 	@${ECHO_MSG} "PREFIX must be defined as an absolute path so that when 'make'"
 	@${ECHO_MSG} "is invoked in the work area PREFIX points to the right place."