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-rw-r--r--nixos/modules/services/continuous-integration/hydra/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/nixos/modules/services/continuous-integration/hydra/default.nix b/nixos/modules/services/continuous-integration/hydra/default.nix
index 57f592a2e550..c515622d11a0 100644
--- a/nixos/modules/services/continuous-integration/hydra/default.nix
+++ b/nixos/modules/services/continuous-integration/hydra/default.nix
@@ -233,6 +233,7 @@ in
           hydra_logo ${cfg.logo}
         ''}
         gc_roots_dir ${cfg.gcRootsDir}
+        use-substitutes = ${if cfg.useSubstitutes then "1" else "0"}
       '';
 
     environment.systemPackages = [ cfg.package ];