feat(droid): add remote building

devices/android/nix-on-droid.nix

@@ -1,4 +1,9 @@
-{pkgs, ...}: {
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: {
   vars = {
     mainUser = "nix-on-droid";
     hostName = "localhost";
@@ -13,7 +18,8 @@
     ];
   })}/share/fonts/truetype/NerdFonts/JetBrainsMonoNerdFontMono-Regular.ttf";
 
-  environment.packages = with pkgs; [
+  environment.packages =
+    (with pkgs; [
       diffutils
       findutils
       utillinux
@@ -32,7 +38,26 @@
       unzip
       openssh
       perl
+      which
       alejandra
+    ])
+    ++ [
+      (pkgs.writeShellApplication {
+        name = "switch";
+        runtimeInputs = with pkgs; [
+          nix-output-monitor
+        ];
+        text = ''
+          exec nix-on-droid ${lib.concatStringsSep " " [
+            "switch"
+            "--flake ${config.environment.variables.FLAKE}"
+            "--builders ssh-ng://matt@100.64.0.7"
+            ''"$@"''
+            "|&"
+            "nom"
+          ]}
+        '';
+      })
     ];
 
   environment.etcBackupExtension = ".bak";

devices/servivi/default.nix

@@ -37,7 +37,7 @@ in {
       homeMode = "500";
 
       openssh.authorizedKeys.keys = [
-        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGOujvC5JLnyjqD1bzl/H0256Gxw/biu7spIHy3YJiDL root@oksys"
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGOujvC5JLnyjqD1bzl/H0256Gxw/biu7spIHy3YJiDL"
       ];
     };
   };

devices/servivi/hardware-configuration.nix

@@ -35,6 +35,9 @@
         configurationLimit = 30;
       };
     };
+
+    # Support building binaries for arm64
+    binfmt.emulatedSystems = ["aarch64-linux"];
   };
 
   fileSystems = {