Abort unsupported runs before installing the tested package

src/tox_current_env/hooks.py

@@ -115,6 +115,13 @@ def tox_testenv_create(venv, action):
         return None  # let tox handle the rest
 
 
+@tox.hookimpl
+def tox_package(session, venv):
+    """Fail early when unsupported"""
+    config = venv.envconfig.config
+    unsupported_raise(config, venv)
+
+
 @tox.hookimpl
 def tox_testenv_install_deps(venv, action):
     """We don't install anything"""