--- ./Makefile.orig	2013-09-19 04:36:32.000000000 +0200
+++ ./Makefile	2014-02-18 11:18:22.000000000 +0100
@@ -146,10 +146,10 @@
 # Install all target files (binaries, libraries, docs, etc.)
 
 install: all
-	${MKDIR} -p ${PREFIX}/bin ${PREFIX}/man/man1 ${DATADIR}/include
-	${INSTALL} -s -m 0555 ${BIN} ${PREFIX}/bin
-	${INSTALL} -m 0444 ${MAN} ${MANPREFIX}/man/man1
-	${CP} -R Include/* ${DATADIR}/include
+	${MKDIR} -p ${DESTDIR}${PREFIX}/bin ${DESTDIR}${MANPREFIX}/man/man1 ${DESTDIR}${DATADIR}/include
+	${INSTALL} -s -m 0555 ${BIN} ${DESTDIR}${PREFIX}/bin
+	${INSTALL} -m 0444 ${MAN} ${DESTDIR}${MANPREFIX}/man/man1
+	${CP} -R Include/* ${DESTDIR}${DATADIR}/include
 
 ############################################################################
 # Remove all installed files