diff --git a/tools/snap/generate_dnsplugins_all.sh b/tools/snap/generate_dnsplugins_all.sh
index f69115ea3..769b4ef4d 100755
--- a/tools/snap/generate_dnsplugins_all.sh
+++ b/tools/snap/generate_dnsplugins_all.sh
@@ -9,6 +9,5 @@ for PLUGIN_PATH in "${CERTBOT_DIR}"/certbot-dns-*; do
   bash "${CERTBOT_DIR}"/tools/snap/generate_dnsplugins_snapcraft.sh $PLUGIN_PATH
   bash "${CERTBOT_DIR}"/tools/snap/generate_dnsplugins_postrefreshhook.sh $PLUGIN_PATH
   # Create constraints file
-  "${CERTBOT_DIR}"/tools/merge_requirements.py tools/dev_constraints.txt \
-    tools/requirements.txt > "${PLUGIN_PATH}"/snap-constraints.txt
+  cp "${CERTBOT_DIR}"/tools/requirements.txt "${PLUGIN_PATH}"/snap-constraints.txt
 done