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-rw-r--r--buildstream/source.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/buildstream/source.py b/buildstream/source.py
index b5c38335b..af89ff8aa 100644
--- a/buildstream/source.py
+++ b/buildstream/source.py
@@ -1165,7 +1165,7 @@ class Source(Plugin):
#
def __extract_config(self, meta):
config = _yaml.node_get(self.__defaults, Mapping, 'config', default_value={})
- config = _yaml.node_chain_copy(config)
+ config = _yaml.node_copy(config)
_yaml.composite(config, meta.config)
_yaml.node_final_assertions(config)