diff --git a/biology/sim4/Makefile b/biology/sim4/Makefile
index dc5087c67698..21844aea6886 100644
--- a/biology/sim4/Makefile
+++ b/biology/sim4/Makefile
@@ -18,12 +18,11 @@ WRKSRC=		${WRKDIR}/sim4.${PORTVERSION:S/./-/g}
 ALL_TARGET=	sim4
 PLIST_FILES=	bin/sim4
 
-NO_STAGE=	yes
 post-patch:
 	${REINPLACE_CMD} -e 's|^CC=|CC?=|g ; \
 		s|^CFLAGS=|CFLAGS+=|g' ${WRKSRC}/Makefile
 
 do-install:
-	@ ${INSTALL_PROGRAM} ${WRKSRC}/sim4 ${PREFIX}/bin
+	${INSTALL_PROGRAM} ${WRKSRC}/sim4 ${STAGEDIR}${PREFIX}/bin
 
 .include <bsd.port.mk>