diff --git a/Makefile b/Makefile
index 2cecb0c..33c62fe 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,24 @@
 prefix=/usr/local
+exec_prefix=$(prefix)
+bindir=$(exec_prefix)/bin
+datarootdir=$(prefix)/share
+datadir=$(datarootdir)
+mandir=$(datarootdir)/man
 
 # files that need mode 755
 EXEC_FILES=git-standup
 
+.PHONY: all install uninstall
+
 all:
 	@echo "usage: make install"
 	@echo "       make uninstall"
 
 install:
-	install -m 0755 $(EXEC_FILES) $(prefix)/bin
+	mkdir -p $(bindir)
+	install -m 0755 $(EXEC_FILES) $(bindir)
 
 uninstall:
-	test -d $(prefix)/bin && \
-	cd $(prefix)/bin && \
+	test -d $(bindir) && \
+	cd $(bindir) && \
 	rm -f $(EXEC_FILES)
\ No newline at end of file