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-rw-r--r--src/libstore/globals.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 95c8859cfa94..f3a6038cafae 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -60,7 +60,7 @@ public:
     Setting<bool> keepGoing{this, false, "keep-going",
         "Whether to keep building derivations when another build fails."};
 
-    Setting<bool> tryFallback{this, tryFallback, "build-fallback",
+    Setting<bool> tryFallback{this, false, "build-fallback",
         "Whether to fall back to building when substitution fails."};
 
     /* Whether to show build log output in real time. */