--- EV/Makefile.PL	2008/04/06 09:53:16	1.32
+++ EV/Makefile.PL	2008/04/15 04:41:57	1.33
@@ -76,7 +76,7 @@
 
 EOF
 
-$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", (-e "/usr/include/sys/eventfd.h") ? "y" : "n") =~ /[yY]/));
+$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", (-e "/usr/include/sys/eventfd.h") || $ENV{EV_EVENTFD} ? "y" : "n") =~ /[yY]/));
 
 print <<EOF;