diff --git a/.env b/.env
new file mode 100644
index 0000000..ae09054
--- /dev/null
+++ b/.env
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if lsvirtualenv -b | grep -qm1 '^antigen$'; then
+    workon antigen
+else
+    mkvirtualenv -r requirements.txt --distribute antigen
+fi