Make tox build wheel once

adamchainz · adamchainz · commit 9a1f89b7fb2c · 2024-03-08T22:52:08.000Z
diff --git a/tox.ini b/tox.ini
@@ -10,6 +10,7 @@ env_list =
 
 [testenv]
 package = wheel
+wheel_build_env = .pkg
 deps =
     -r requirements/{envname}.txt
 set_env =
