diff --git a/external/.gitignore b/external/.gitignore
index e110829f3f775..bc0cc5eea8aad 100644
--- a/external/.gitignore
+++ b/external/.gitignore
@@ -8,7 +8,6 @@
 /arpack-*
 /fftw-*
 /libunwind-*
-/open-unwind
 /lighttpd-*
 /Clp-*
 /SuiteSparse-*
diff --git a/external/Makefile b/external/Makefile
index 6dae4664d0aa6..f06037eb63643 100644
--- a/external/Makefile
+++ b/external/Makefile
@@ -423,27 +423,26 @@ distclean-clp:
 ## UNWIND ##
 
 LIBUNWIND_TARGET_OBJ = $(EXTROOTLIB)/libunwind.a
-LIBUNWIND_TARGET_SOURCE = libunwind-$(UNWIND_VER)/Makefile
+LIBUNWIND_TARGET_SOURCE = libunwind-$(UNWIND_VER)/src/.libs/libunwind.a
 
 compile-unwind: $(LIBUNWIND_TARGET_SOURCE)
 install-unwind: $(LIBUNWIND_TARGET_OBJ)
 
-$(LIBUNWIND_TARGET_OBJ): $(LIBUNWIND_TARGET_SOURCE)
-	cd libunwind-$(UNWIND_VER) && $(MAKE) && $(MAKE) install
-
 libunwind-$(UNWIND_VER).tar.gz:
-	wget http://savannah.spinellicreations.com/libunwind/libunwind-$(UNWIND_VER).tar.gz 
+	wget http://savannah.spinellicreations.com/libunwind/libunwind-$(UNWIND_VER).tar.gz
+libunwind-$(UNWIND_VER)/Makefile: libunwind-$(UNWIND_VER).tar.gz
+	tar xfz $<
+	cd libunwind-$(UNWIND_VER) && ./configure  CFLAGS="-U_FORTIFY_SOURCE -fPIC" --prefix=$(abspath $(EXTROOT))
 
-open-unwind: libunwind-$(UNWIND_VER).tar.gz
-	tar xvfz $<
-	touch $@
+$(LIBUNWIND_TARGET_SOURCE): libunwind-$(UNWIND_VER)/Makefile
+	cd libunwind-$(UNWIND_VER) && $(MAKE)
 
-$(LIBUNWIND_TARGET_SOURCE): open-unwind
-	cd libunwind-$(UNWIND_VER) && ./configure  CFLAGS="-U_FORTIFY_SOURCE -fPIC" --prefix=$(abspath $(EXTROOT))
+$(LIBUNWIND_TARGET_OBJ): $(LIBUNWIND_TARGET_SOURCE)
+	cd libunwind-$(UNWIND_VER) && $(MAKE) install
 
 clean-unwind:
 	$(MAKE) -C libunwind-$(UNWIND_VER) clean
-	rm -rf $(LIBUNWIND_TARGET_OBJ) $(LIBUNWIND_TARGET_SOURCE)
+	rm -f $(LIBUNWIND_TARGET_OBJ) $(LIBUNWIND_TARGET_SOURCE)
 
 distclean-unwind:
 	rm -rf libunwind-$(UNWIND_VER).tar.gz libunwind-$(UNWIND_VER)