--- Makefile.bsd.orig	2014-06-10 23:16:23.285874501 +0800
+++ Makefile.bsd	2014-06-10 23:16:59.938863115 +0800
@@ -77,13 +77,13 @@ lib:	testfpost libchoice
 
 install: instchoice all
 	@echo "Creating directory $(INSTALL_PATH) ..."
-	@mkdir $(INSTALL_PATH) 
+	@mkdir $(DESTDIR)$(INSTALL_PATH) 
 	@echo "Copying binaries in $(INSTALL_PATH) ..."
-	@cp -f ./bin/* $(INSTALL_PATH)/
+	@cp -f ./bin/* $(DESTDIR)$(INSTALL_PATH)/
 	@echo "Copying bugscrypt.a in $(INSTALL_PATH) ..."
-	@cp -f ./lib/bugscrypt.a $(INSTALL_PATH)/
+	@cp -f ./lib/bugscrypt.a $(DESTDIR)$(INSTALL_PATH)/
 	@echo "Copying docs in $(INSTALL_PATH) ..."
-	@cp -rf ./doc/* $(INSTALL_PATH)/
+	@cp -rf ./doc/* $(DESTDIR)$(INSTALL_PATH)/
 	@echo
 	@echo ------------------------------------------------------------
 	@echo