Add box derivation to build a vm

.gitignore

@@ -1,2 +1,3 @@
 *.swp
 result
+*.qcow2

flake.lock

@@ -21,6 +21,42 @@
         "type": "github"
       }
     },
+    "nixlib": {
+      "locked": {
+        "lastModified": 1719708727,
+        "narHash": "sha256-XFNKtyirrGNdehpg7lMNm1skEcBApjqGhaHc/OI95HY=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "1bba8a624b3b9d4f68db94fb63aaeb46039ce9e6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "nixos-generators": {
+      "inputs": {
+        "nixlib": "nixlib",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1720055043,
+        "narHash": "sha256-SKizewU4UeYrkZWPUjur8EoxscGoNb0pGcrNL4YzAIg=",
+        "owner": "nix-community",
+        "repo": "nixos-generators",
+        "rev": "168b220231a70e47cc1f0919048fa5914415fb18",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixos-generators",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1720553833,
@@ -40,6 +76,7 @@
     "root": {
       "inputs": {
         "home-manager": "home-manager",
+        "nixos-generators": "nixos-generators",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -5,9 +5,13 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
     home-manager.url = "github:nix-community/home-manager/release-24.05";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
+    nixos-generators = {
+      url = "github:nix-community/nixos-generators";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, home-manager, ...}:
+  outputs = { self, nixpkgs, home-manager, nixos-generators,...}:
     let
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
@@ -28,5 +32,9 @@
           modules = [ ./home/rothe.nix ];
         };
       };
+      box = nixos-generators.nixosGenerate {
+        system = "x86_64-linux";
+        format = "vm";
+      };
     };
 }