diff --git a/tox.ini b/tox.ini
index f55e749..9db6ba4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,4 +1,5 @@
 [tox]
+isolated_build = True
 envlist = black,flake8,isort,mypy,griffon
 skipsdist = false