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-rw-r--r--ops/machines/whitby/default.nix4
1 files changed, 4 insertions, 0 deletions
diff --git a/ops/machines/whitby/default.nix b/ops/machines/whitby/default.nix
index 8c0b7d1841dd..786b240004f3 100644
--- a/ops/machines/whitby/default.nix
+++ b/ops/machines/whitby/default.nix
@@ -674,5 +674,9 @@ in
 
   zramSwap.enable = true;
 
+  # Use TVL cache locally through the proxy; for cross-builder substitution.
+  tvl.cache.enable = true;
+  tvl.cache.builderball = true;
+
   system.stateVersion = "20.03";
 }