diff --git a/Makefile b/Makefile
index 14c63cb..f4cb0b0 100644
--- a/Makefile
+++ b/Makefile
@@ -2,15 +2,20 @@
 ### I think it's not worth to make such a small project
 ### modular. So this is a simple gnu Makefile...
 ###
+STRIP ?= strip
+INSTALL ?= install
+
+CFLAGS := $(CFLAGS) -g -Wall
 
 fbgrab: fbgrab.c
-	splint +posixlib fbgrab.c
-	gcc -g -Wall fbgrab.c -lpng -lz -o fbgrab
+	$(CC) $(CFLAGS) $(LDFLAGS) fbgrab.c -lpng -lz -o fbgrab
+	$(STRIP) fbgrab
 
 install:
-	strip fbgrab
-	install fbgrab /usr/bin/fbgrab
-	install fbgrab.1.man /usr/man/man1/fbgrab.1
+	mkdir -p $(DESTDIR)/usr/bin/
+	mkdir -p $(DESTDIR)/usr/man/man1/
+	$(INSTALL) fbgrab $(DESTDIR)/usr/bin/fbgrab
+	$(INSTALL) fbgrab.1.man $(DESTDIR)/usr/man/man1/fbgrab.1
 
 clean:
-	rm -f fbgrab *~ \#*\#
\ No newline at end of file
+	rm -f fbgrab *~ \#*\#