Merge branch 'offline-installer'

installer/auto-install.nix

@@ -8,7 +8,7 @@
   inputs,
   hostName,
   hostPlatform,
-  targetSystem,
+  targetSystemBuild,
   diskoScript,
   ...
 }:
@@ -18,7 +18,7 @@
     pkgs.git
     pkgs.bashInteractive
     pkgs.curl
-    targetSystem
+    targetSystemBuild.toplevel
   ];
 
   # Explicitly include the system closure in the ISO image to prevent any need to build or fetch
@@ -31,6 +31,12 @@
 
   nixpkgs.hostPlatform = hostPlatform;
 
+  nix.settings.experimental-features = "nix-command flakes";
+
+  system.extraDependencies = with targetSystemBuild; [ toplevel etc bootStage2 ];
+
+  isoImage.storeContents = [ targetSystemBuild.toplevel ];
+
   systemd.services.auto-install = {
     description = "Automatic NixOS install for ${hostName}";
     after = [
@@ -53,14 +59,12 @@
       echo ">>> Running disko script..."
       ${diskoScript}
 
-      echo ">>> Running nixos-install..."
-      # Use only local store - don't fetch from binary cache or build
+      echo ">>> Setting up NixOS..."
       nixos-install \
-        --no-root-passwd \
-        --root /mnt \
-        --system ${targetSystem} \
-        --option substitute false \
-        --option build-use-sandbox false
+      --system ${targetSystemBuild.toplevel} \
+      --no-root-passwd \
+      --no-channel-copy \
+      --substituters "" 
 
       echo ">>> Done. Rebooting."
       systemctl reboot