--- Makefile.orig	2014-08-14 16:40:12.245403240 +0800
+++ Makefile	2014-08-14 16:40:52.823402660 +0800
@@ -35,19 +35,19 @@ all: 
 	cd x1;  ${MAKE} "FC=${FC}" "FFLAGS=${FFLAGS}" 
 	cd x2;  ${MAKE} "FC=${FC}" "FFLAGS=${FFLAGS}" 
 install:
-	install -s -m 755 x1/exec1          ${BINDIR}
-	install -m 644    x2/exec2.o        ${LIBDIR}
-	install -m 644    x2/libx2.a        ${LIBDIR}
-	install -s -m 755 x3/ngp_gnu        ${BINDIR}
-	install -s -m 755 x3/asa            ${BINDIR}
-	install -m 644    x3/libx3.a        ${LIBDIR}
-	install -m 755    bin/sceptre       ${BINDIR}
-	install -m 755    bin/sceptre.inst  ${BINDIR}
-	install -m 755    bin/ngp           ${BINDIR}
-	install -m 644    lib/usrlib.a      ${LIBDIR}
-	install -m 644    lib/modellib.dat  ${LIBDIR}
-	install -d 			    ${ETCDIR}
-	install -m 644    etc/ngp.rc        ${ETCDIR}
+	install -s -m 755 x1/exec1          $(DESTDIR)${BINDIR}
+	install -m 644    x2/exec2.o        $(DESTDIR)${LIBDIR}
+	install -m 644    x2/libx2.a        $(DESTDIR)${LIBDIR}
+	install -s -m 755 x3/ngp_gnu        $(DESTDIR)${BINDIR}
+	install -s -m 755 x3/asa            $(DESTDIR)${BINDIR}
+	install -m 644    x3/libx3.a        $(DESTDIR)${LIBDIR}
+	install -m 755    bin/sceptre       $(DESTDIR)${BINDIR}
+	install -m 755    bin/sceptre.inst  $(DESTDIR)${BINDIR}
+	install -m 755    bin/ngp           $(DESTDIR)${BINDIR}
+	install -m 644    lib/usrlib.a      $(DESTDIR)${LIBDIR}
+	install -m 644    lib/modellib.dat  $(DESTDIR)${LIBDIR}
+	install -d 			    $(DESTDIR)${ETCDIR}
+	install -m 644    etc/ngp.rc        $(DESTDIR)${ETCDIR}
 	@echo "installation finished"
 uninstall:
 	@rm -fv ${BINDIR}/exec1