diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000000000000000000000000000000000000..018c3b4389a0b7d7f12b8291475f220e9b7fb6fe
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,2 @@
+[egg_info]
+tag_build = .dev