--- Makefile.orig	2014-06-10 00:10:49.502121136 +0800
+++ Makefile	2014-06-10 00:11:31.903120544 +0800
@@ -38,14 +38,14 @@ CLEANFILES+=	${PROG}.1
 # Install example config file
 #
 beforeinstall:
-	@if [ ! -d ${PREFIX}/etc/${PROG} ]; then \
+	@if [ ! -d $(DESTDIR)${PREFIX}/etc/${PROG} ]; then \
 		${ECHO} ${INSTALL} -d -o ${SHAREOWN} -g ${SHAREGRP} -m 0755 \
-		    ${PREFIX}/etc/${PROG}; \
+		    $(DESTDIR)${PREFIX}/etc/${PROG}; \
 		${INSTALL} -d -o ${SHAREOWN} -g ${SHAREGRP} -m 0755 \
-		    ${PREFIX}/etc/${PROG}; \
+		    $(DESTDIR)${PREFIX}/etc/${PROG}; \
 	fi
 	${INSTALL} -C -o ${SHAREOWN} -g ${SHAREGRP} -m 0644 \
-	    ${CONFIG_SAMPLE} ${PREFIX}/etc/${PROG}/${CONFIG_SAMPLE}
+	    ${CONFIG_SAMPLE} $(DESTDIR)${PREFIX}/etc/${PROG}/${CONFIG_SAMPLE}
 
 distclean:	cleandir