diff --git a/debian/rules b/debian/rules
index 6fe73a9..890ed2e 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,17 +1,17 @@
 #!/usr/bin/make -f
 
 export PYBUILD_NAME=swh.graph
 export no_proxy=localhost,127.0.0.1
 # only naive_client implementation are tested
 export PYBUILD_TEST_ARGS=-vv -s -k 'naive'
 
 %:
 	dh $@ --with python3 --buildsystem=pybuild
 
 override_dh_auto_install:
 	for pyvers in $(shell py3versions -vr); do \
 	    mkdir -p $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/swh/graph/ ; \
-	    mv $(CURDIR)/*.egg-info $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/ ; \
-	    mv $(CURDIR)/swh/graph/*client.py $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/swh/graph/ ; \
-	    mv $(CURDIR)/swh/graph/tests/ $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/swh/graph/ ; \
+	    cp -r $(CURDIR)/*.egg-info $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/ ; \
+	    cp $(CURDIR)/swh/graph/*client.py $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/swh/graph/ ; \
+	    cp -r $(CURDIR)/swh/graph/tests/ $(CURDIR)/debian/python3-swh.graph.client/usr/lib/python$$pyvers/dist-packages/swh/graph/ ; \
 	done