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-rw-r--r--src/buildstream/element.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/buildstream/element.py b/src/buildstream/element.py
index e25b387c0..8a70396be 100644
--- a/src/buildstream/element.py
+++ b/src/buildstream/element.py
@@ -2561,7 +2561,7 @@ class Element(Plugin):
def __expand_environment(self, environment):
# Resolve variables in environment value strings
final_env = {}
- for key, _ in self.node_items(environment):
+ for key in environment.keys():
final_env[key] = self.node_subst_member(environment, key)
return final_env