diff -Nurd libcryptopp2/GNUmakefile libcryptopp/GNUmakefile
--- libcryptopp2/GNUmakefile	2013-02-20 15:30:52.000000000 +0100
+++ libcryptopp/GNUmakefile	2013-12-01 20:58:53.774735203 +0100
@@ -148,17 +148,17 @@
 	-$(RM) cryptest.exe libcryptopp.a libcryptopp.so $(LIBOBJS) $(TESTOBJS) cryptopp.dll libcryptopp.dll.a libcryptopp.import.a cryptest.import.exe dlltest.exe $(DLLOBJS) $(LIBIMPORTOBJS) $(TESTI MPORTOBJS) $(DLLTESTOBJS)
 
 install:
-	$(MKDIR) -p $(PREFIX)/include/cryptopp $(PREFIX)/lib $(PREFIX)/bin
-	-$(CP) *.h $(PREFIX)/include/cryptopp
-	-$(CP) *.a $(PREFIX)/lib
-	-$(CP) *.so $(PREFIX)/lib
-	-$(CP) *.exe $(PREFIX)/bin
+	$(MKDIR) -p $(DESTDIR)$(PREFIX)/include/cryptopp $(DESTDIR)$(PREFIX)/lib $(DESTDIR)$(PREFIX)/bin
+	-$(CP) *.h $(DESTDIR)$(PREFIX)/include/cryptopp
+	-$(CP) *.a $(DESTDIR)$(PREFIX)/lib
+	-$(CP) *.so $(DESTDIR)$(PREFIX)/lib
+	-$(CP) *.exe $(DESTDIR)$(PREFIX)/bin
 
 remove:
-	-$(RM) -rf $(PREFIX)/include/cryptopp
-	-$(RM) $(PREFIX)/lib/libcryptopp.a
-	-$(RM) $(PREFIX)/lib/libcryptopp.so
-	-$(RM) $(PREFIX)/bin/cryptest.exe
+	-$(RM) -rf $(DESTDIR)$(PREFIX)/include/cryptopp
+	-$(RM) $(DESTDIR)$(PREFIX)/lib/libcryptopp.a
+	-$(RM) $(DESTDIR)$(PREFIX)/lib/libcryptopp.so
+	-$(RM) $(DESTDIR)$(PREFIX)/bin/cryptest.exe
 
 libcryptopp.a: $(LIBOBJS)
 	$(AR) $(ARFLAGS) $@ $(LIBOBJS)