misc: Add everything

modules/programs/distributed-build/builder.nix

@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+
+{
+  boot.binfmt.emulatedSystems = [ "i686-linux" ]; # For remote building
+  environment.systemPackages = with pkgs; [ openssh ];
+  nix.trustedUsers = ["builder"];
+
+  # TODO: Specify a firewall rule to only allow this from my other NixOS machines
+  users.extraUsers."builder" = {
+    isSystemUser = true;
+    useDefaultShell = true;
+    openssh.authorizedKeys.keys = [
+      "ssh-rsa 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 alexander@mikulinux
+"
+    ];
+  };
+}

modules/programs/distributed-build/offload.nix

@@ -0,0 +1,22 @@
+{ pkgs, ... }:
+
+{
+  nix = {
+    distributedBuilds = true;
+    buildMachines = [{
+      hostName = "mikulinux";
+      systems = [ "x86_64-linux" "i686-linux" ];
+      maxJobs = 4;
+      speedFactor = 2;
+      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
+    }];
+  };
+
+  programs.ssh.extraConfig = ''
+Host mikulinux
+  HostName 192.168.178.38
+  User builder
+  IdentitiesOnly yes
+  IdentityFile /root/.ssh/id_builder
+  '';
+}