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-rw-r--r--buildstream/_artifactcache.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/buildstream/_artifactcache.py b/buildstream/_artifactcache.py
index 48ab278c4..de63d30f1 100644
--- a/buildstream/_artifactcache.py
+++ b/buildstream/_artifactcache.py
@@ -467,7 +467,7 @@ class ArtifactCache():
# on_failure (callable): Called if we fail to contact one of the caches.
#
def initialize_remotes(self, *, on_failure=None):
- remote_specs = self.global_remote_specs
+ remote_specs = list(self.global_remote_specs)
for project in self.project_remote_specs:
remote_specs += self.project_remote_specs[project]