Use git.mk
diff --git a/src/Makefile.am b/src/Makefile.am
index b845eb6..5c0b18e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -60,3 +60,5 @@
 	README		\
 	COPYING		\
 	$(INCLUDEDSOURCES)
+
+-include $(top_srcdir)/git.mk