--- Makefile.orig	2010-06-07 04:10:15.000000000 +0300
+++ Makefile	2010-07-15 20:35:21.000000000 +0300
@@ -125,6 +125,12 @@
 	${INSTALL_DATA} ${WRKSRC}/doc/spec.txt \
 		${DESTDIR}${PREFIX}/share/doc/exim
 
+.if !empty(PKG_OPTIONS:Mexim-perl)
+.include "../../lang/perl5/buildlink3.mk"
+.endif
+.if !empty(PKG_OPTIONS:Mexim-spf)
+.include "../../mail/libspf2/buildlink3.mk"
+.endif
 .include "../../converters/libiconv/buildlink3.mk"
 .include "../../devel/pcre/buildlink3.mk"
 .include "../../mk/bsd.pkg.mk"