Use an isolated build in tox (#393)

adamchainz · web-flow · commit cde4029f899a · 2022-06-05T11:49:35.000+01:00
diff --git a/tox.ini b/tox.ini
@@ -1,4 +1,5 @@
 [tox]
+isolated_build = True
 envlist =
     py37-django{32}
     py38-django{32,40,41}
