diff --git a/tcl.yaml b/tcl.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..11113af77df0a596719f44d2b8ef1f5ffca65765
--- /dev/null
+++ b/tcl.yaml
@@ -0,0 +1,4 @@
+version_control: github
+src_repo: tcltk/tcl
+tag_prefix: ^core-
+seperator: -