diff --git a/nixos/distributed-builds.nix b/nixos/distributed-builds.nix
index 9f8266a7..cadac6a8 100644
--- a/nixos/distributed-builds.nix
+++ b/nixos/distributed-builds.nix
@@ -6,6 +6,8 @@
     StrictHostKeyChecking=accept-new
   '';
 
+  nix.settings.trusted-substituters = [ "nix-builder@bolty" ];
+
   nix.buildMachines = [{
     hostName = "bolty";
     sshUser = "nix-builder";