1 files changed, 3 insertions, 0 deletions

diff --git a/modules/build-client.nix b/modules/build-client.nix
index 1616918f..9924b751 100644
--- a/modules/build-client.nix
+++ b/modules/build-client.nix
@@ -106,6 +106,9 @@ in {
 
     nix = {
       distributedBuilds = true;
+      extraOptions = ''
+        builders-use-substitutes = true
+      '';
       buildMachines = mapAttrsToList (name: hCfg: { hostName = buildHostName name; inherit (hCfg) system systems maxJobs speedFactor mandatoryFeatures supportedFeatures; }) cfg;
     };
   };