diff --git a/contrib/checkbox-provider-ce-oem/tox.ini b/contrib/checkbox-provider-ce-oem/tox.ini
index 2199708c9a..c7ab4b3644 100644
--- a/contrib/checkbox-provider-ce-oem/tox.ini
+++ b/contrib/checkbox-provider-ce-oem/tox.ini
@@ -43,6 +43,7 @@ setenv=
 # we do not care about the package version in tox
 #  but it breaks some old python3.5 builds
     SETUPTOOLS_SCM_PRETEND_VERSION=0.0
+    SETUPTOOLS_SCM_DEBUG=1
 
 [testenv:py3.6]
 deps =