--- Makefile.orig	2011-01-18 18:39:10.000000000 +0800
+++ Makefile	2014-06-09 11:58:06.803930107 +0800
@@ -3,7 +3,7 @@
 VERSION=0.0.33
 
 DEBUG= -g  -D_DEBUG #-fprofile-arcs -ftest-coverage # -pg -g
-CXXFLAGS+=-Wall -O2 -DVERSION=\"${VERSION}\" $(DEBUG)
+CXXFLAGS+=-DUSE_MMAP -Wall -O2 -DVERSION=\"${VERSION}\" $(DEBUG)
 CFLAGS+=${CXXFLAGS}
 LDFLAGS+=$(DEBUG) -lcrypto -lssl -lstdc++
 
@@ -15,7 +15,7 @@ nagircbot: $(OBJS)
 	$(CC) -Wall -W $(OBJS) $(LDFLAGS) -o nagircbot
 
 install: nagircbot
-	cp nagircbot /usr/local/bin
+	cp nagircbot $(DESTDIR)${PREFIX}/bin
 
 clean:
 	rm -f $(OBJS) nagircbot core *.da *.gcov *.bb*