diff --git a/Makefile b/Makefile
index 35aad9e..4633154 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,13 @@
 PREFIX ?= /usr
+CONFDIR ?= /etc
 
 all:
 	@echo Run \'make install\' to install mca
 
 install:
 	@install -m 0755 mca.sh -D $(DESTDIR)$(PREFIX)/bin/mca
-	@install -m 0644 screenrc -Dt $(DESTDIR)/etc/mca
+	@install -m 0644 screenrc -Dt $(DESTDIR)$(CONFDIR)/mca
 
 uninstall:
-	@rm -rf $(DESTDIR)/etc/mca
+	@rm -rf $(DESTDIR)$(CONFDIR)/mca
 	@rm -f $(DESTDIR)$(PREFIX)/bin/mca