add bolty as substituter

nixos/boxes/bolty/nix-store-server.nix

@@ -3,13 +3,4 @@
   pkgs,
   ...
 }: {
-  networking.firewall.allowedTCPPorts = [10000 10001];
-  services.minio = {
-    enable = true;
-    region = "home";
-    dataDir = ["/var/lib/minio/data"];
-    configDir = "/var/lib/minio/config";
-    listenAddress = ":10000";
-    consoleAddress = ":10001";
-  };
 }

nixos/distributed-builds.nix

@@ -27,4 +27,5 @@
     builders-use-substitutes = true
   '';
   nix.distributedBuilds = true;
+  nix.settings.substituters = ["nix-builder@bolty" "https://cache.nixos.org/"];
 }

nixos/server-security.nix

@@ -29,4 +29,6 @@ in {
   };
 
   nix.settings.trusted-users = ["root" "nix-builder"];
+  nix.sshServe.enable = true;
+  nix.sshServe.keys = authorizedKeys;
 }