diff --git a/Makefile b/Makefile
index a788929..15dc596 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,22 @@
 PREFIX ?= $(HOME)/.local
-DESTDIR ?= $(PREFIX)
+DESTDIR ?= ""
 VERSION = 1.1
 
+bindir = $(PREFIX)/bin
+libdir = $(PREFIX)/lib
+sharedir = $(PREFIX)/share
+
 install: $(bin)
-	install -d $(DESTDIR)/bin
-	sed -e 's*%PREFIX%*$(PREFIX)*; s*%VERSION%*$(VERSION)*' giteapc.py > $(DESTDIR)/bin/giteapc
-	chmod +x $(DESTDIR)/bin/giteapc
-	install -d $(DESTDIR)/lib/giteapc/giteapc
-	install giteapc/*.py $(DESTDIR)/lib/giteapc/giteapc
+	install -d $(DESTDIR)$(bindir)
+	sed -e 's*%PREFIX%*$(PREFIX)*; s*%VERSION%*$(VERSION)*' giteapc.py > $(DESTDIR)$(bindir)/giteapc
+	chmod +x $(DESTDIR)$(bindir)/giteapc
+	install -d $(DESTDIR)$(libdir)/giteapc/giteapc
+	install giteapc/*.py $(DESTDIR)$(libdir)/giteapc/giteapc
 
 uninstall:
-	rm -f $(PREFIX)/bin/giteapc
-	rm -rf $(PREFIX)/lib/giteapc
-	rmdir $(PREFIX)/share/giteapc 2>/dev/null || true
+	rm -f $(PREFIX)$(bindir)/giteapc
+	rm -rf $(PREFIX)$(libdir)/giteapc
+	rmdir $(PREFIX)$(sharedir)/giteapc 2>/dev/null || true
 	@ echo "note: repositories cloned by GiteaPC have not been removed"
 
 .PHONY: install uninstall