diff --git a/nss.yaml b/nss.yaml
new file mode 100644
index 0000000..3aa22ba
--- /dev/null
+++ b/nss.yaml
@@ -0,0 +1,4 @@
+version_control: hg
+src_repo: https://hg.mozilla.org/projects/nss
+tag_prefix: ^NSS_
+seperator: _