demo vm

nixos/hosts/olympus/bastion/configuration.nix

@@ -2,10 +2,11 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ pkgs, ... }: {
+{ pkgs, inputs, ... }: {
   imports = [
     # Include the results of the hardware scan.
     ./hardware-configuration.nix
+    ./vms.nix
   ];
 
   programs.nix-ld.enable = true;
@@ -27,10 +28,10 @@
   # Additional packages
   environment.systemPackages = with pkgs; [ vault ];
 
+  networking.useNetworkd = true;
+
   programs.gnupg.agent = {
     enable = true;
     pinentryFlavor = "curses";
   };
-
-  home-manager.users.vivian = import ./home.nix;
 }

nixos/hosts/olympus/bastion/home.nix

@@ -1,11 +0,0 @@
-_: {
-  programs.direnv = {
-    enable = true;
-    nix-direnv = { enable = true; };
-  };
-
-  programs.zsh = {
-    enable = true;
-    sessionVariables = { DIRENV_LOG_FORMAT = ""; };
-  };
-}

nixos/hosts/olympus/bastion/vms.nix

@@ -0,0 +1,32 @@
+{ config, pkgs, inputs, ... }: {
+  imports = [
+    inputs.microvm.nixosModules.host
+  ];
+
+  microvm.vms = {
+    test-vm = {
+      inherit pkgs;
+
+      # (Optional) A set of special arguments to be passed to the MicroVM's NixOS modules.
+      #specialArgs = {};
+
+      # The configuration for the MicroVM.
+      # Multiple definitions will be merged as expected.
+      config = {
+        # It is highly recommended to share the host's nix-store
+        # with the VMs to prevent building huge images.
+        microvm.hypervisor = "crosvm";
+        microvm.shares = [{
+          source = "/nix/store";
+          mountPoint = "/nix/.ro-store";
+          tag = "ro-store";
+          proto = "virtiofs";
+        }];
+
+        # Any other configuration for your MicroVM
+        # [...]
+      };
+
+    };
+  };
+}