diff --git a/Makefile b/Makefile
index bd024a3..d88e35a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,31 +1,34 @@
 INSTALL ?= install
 
+UNAME=$(shell uname)
+SELECTOR:=$(shell if test "${UNAME}" = "Darwin" ; then echo "-f Makefile.OSX" ; fi)
+
 all:
-	$(MAKE) -C src all
+	$(MAKE) $(SELECTOR) -C src all
 
 test:
-	$(MAKE) -C test all
+	$(MAKE) $(SELECTOR) -C test all
 
 install:
-	$(MAKE) -C src install
-	$(MAKE) -C man install
+	$(MAKE) $(SELECTOR) -C src install
+	$(MAKE) $(SELECTOR) -C man install
 	$(INSTALL) -dm0755 "${DESTDIR}${PREFIX}/share/doc/faketime/"
 	$(INSTALL) -m0644 README "${DESTDIR}${PREFIX}/share/doc/faketime/README"
 	$(INSTALL) -m0644 NEWS "${DESTDIR}${PREFIX}/share/doc/faketime/NEWS"
 
 uninstall:
-	$(MAKE) -C src uninstall
-	$(MAKE) -C man uninstall
+	$(MAKE) $(SELECTOR) -C src uninstall
+	$(MAKE) $(SELECTOR) -C man uninstall
 	rm -f "${DESTDIR}${PREFIX}/share/doc/faketime/README"
 	rm -f "${DESTDIR}${PREFIX}/share/doc/faketime/NEWS"
 	rmdir "${DESTDIR}${PREFIX}/share/doc/faketime"
 
 clean:
-	$(MAKE) -C src clean
-	$(MAKE) -C test clean
+	$(MAKE) $(SELECTOR) -C src clean
+	$(MAKE) $(SELECTOR) -C test clean
 
 distclean:
-	$(MAKE) -C src distclean
-	$(MAKE) -C test distclean
+	$(MAKE) $(SELECTOR) -C src distclean
+	$(MAKE) $(SELECTOR) -C test distclean
 
 .PHONY: all test install uninstall clean distclean
diff --git a/Makefile.OSX b/Makefile.OSX
deleted file mode 100644
index c54142b..0000000
--- a/Makefile.OSX
+++ /dev/null
@@ -1,33 +0,0 @@
-INSTALL ?= install
-
-PREFIX ?= /usr/local
-
-all:
-	$(MAKE) -f Makefile.OSX -C src all
-
-test:
-	$(MAKE) -f Makefile.OSX -C test all
-
-install:
-	$(MAKE) -f Makefile.OSX -C src install
-	$(MAKE) -f Makefile.OSX -C man install
-	$(INSTALL) -dm0755 "${DESTDIR}${PREFIX}/share/doc/faketime/"
-	$(INSTALL) -m0644 README "${DESTDIR}${PREFIX}/share/doc/faketime/README"
-	$(INSTALL) -m0644 NEWS "${DESTDIR}${PREFIX}/share/doc/faketime/NEWS"
-
-uninstall:
-	$(MAKE) -f Makefile.OSX -C src uninstall
-	$(MAKE) -f Makefile.OSX -C man uninstall
-	rm -f "${DESTDIR}${PREFIX}/share/doc/faketime/README"
-	rm -f "${DESTDIR}${PREFIX}/share/doc/faketime/NEWS"
-	rmdir "${DESTDIR}${PREFIX}/share/doc/faketime"
-
-clean:
-	$(MAKE) -f Makefile.OSX -C src clean
-	$(MAKE) -f Makefile.OSX -C test clean
-
-distclean:
-	$(MAKE) -f Makefile.OSX -C src distclean
-	$(MAKE) -f Makefile.OSX -C test distclean
-
-.PHONY: all test install uninstall clean distclean