--- Makefile	2016-07-08 13:24:18.000000000 +0200
+++ Makefile	2017-12-23 14:26:42.948053000 +0100
@@ -26,14 +26,20 @@ 
 USES=		cpe tar:bzip2
 CPE_VENDOR=	gnu
 
-OPTIONS_DEFINE=	NLS
+OPTIONS_DEFINE=	NLS SCHEME
 OPTIONS_SUB=	yes
 
+SCHEME_DESC=	Enable Scheme functions via Guile
+
 NLS_USES=	gettext iconv
 NLS_CONFIGURE_ON=	${ICONV_CONFIGURE_ARG} \
 			--with-libintl-prefix=${LOCALBASE}
 NLS_CONFIGURE_ENABLE=	nls
 
+SCHEME_CONFIGURE_WITH=	guile
+SCHEME_LIB_DEPENDS=	libguile-2.0.so:lang/guile2
+SCHEME_USES=	pkgconfig
+
 INFO=		make
 
 .include <bsd.port.mk>