diff --git a/src/Makevars b/src/Makevars
index 5ddfd10..d40558f 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,5 +1,5 @@
 after: $(SHLIB)
-	mv $(SHLIB) BioC_graph$(SHLIB_EXT)
+	cp $(SHLIB) BioC_graph$(SHLIB_EXT)
 
 # By default, 'R CMD build' won't remove that file so it will end up in the
 # source tarball (observed with R 2.12.0).
