Revert "_project.py: Bumping artifact version for execution environment"
This reverts commit cd62e98834d91cbf32ac7d1408b6c0972c690591.
diff --git a/buildstream/element.py b/buildstream/element.py
index d03f32c..86cac56 100644
--- a/buildstream/element.py
+++ b/buildstream/element.py
@@ -52,7 +52,7 @@
# or if buildstream was changed in a way which can cause
# the same cache key to produce something that is no longer
# the same.
-_BST_CORE_ARTIFACT_VERSION = 1
+_BST_CORE_ARTIFACT_VERSION = 0
# _KeyStrength():