diff --git a/README.md b/README.md
index dd44f76..9ec7be1 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,10 @@ Building the images
 
 First install [packer](http://packer.io) and [virtualbox](https://www.virtualbox.org/)
 
+```bash
+nix-shell -p packer
+```
+
 Then:
 
 ```bash
diff --git a/template.json b/template.json
index 13eabec..fba5eb7 100644
--- a/template.json
+++ b/template.json
@@ -1,11 +1,7 @@
 {
   "builders": [
     {
-      "type": "virtualbox-iso",
-      "boot_wait": "1m",
       "boot_command": [
-        "root<enter>",
-        "stop sshd<enter>",
         "fdisk /dev/sda<enter>",
         "n",
         "<enter><enter><enter><enter><enter>",
@@ -20,36 +16,47 @@
         "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/guest-virtualbox.nix > /mnt/etc/nixos/guest.nix<enter><wait>",
         "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/users-vagrant.nix > /mnt/etc/nixos/users.nix<enter><wait>",
         "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/vagrant.nix > /mnt/etc/nixos/vagrant.nix<enter><wait>",
-        "nixos-install && reboot<enter>"
+        "nixos-install \u0026\u0026 reboot<enter>"
       ],
+      "boot_wait": "1m",
       "guest_additions_mode": "disable",
       "guest_os_type": "Linux_64",
       "http_directory": "nixos",
-      "iso_checksum": "48395b4bd21675703c87cfae1feb68ed",
-      "iso_checksum_type": "md5",
-      "iso_url": "http://releases.nixos.org/nixos/unstable/nixos-14.02pre38596.1dd0e05/nixos-minimal-14.02pre38596.1dd0e05-x86_64-linux.iso",
+      "iso_checksum": "sha256:aa9eeb04a491a84036368a93545400d79d16d281d4b7a29979bbb4f8476f9b81",
+      "iso_url": "https://releases.nixos.org/nixos/22.05/nixos-22.05.1700.365e1b3a859/nixos-minimal-22.05.1700.365e1b3a859-x86_64-linux.iso",
       "shutdown_command": "sudo shutdown -h now",
+      "ssh_private_key_file": "keys/vagrant.key",
+      "ssh_timeout": "20m",
       "ssh_username": "root",
-      "ssh_key_path": "keys/vagrant.key",
-      "ssh_wait_timeout": "20m",
-      "virtualbox_version_file": ".vbox_version",
+      "type": "virtualbox-iso",
       "vboxmanage": [
-        ["modifyvm", "{{.Name}}", "--memory", "1024"],
-        ["modifyvm", "{{.Name}}", "--cpus", "2"]
-      ]
-    }
-  ],
-  "provisioners": [
-    {
-      "type": "shell",
-      "execute_command": "sudo sh '{{.Path}}'",
-      "script": "scripts/postinstall.sh"
+        [
+          "modifyvm",
+          "{{.Name}}",
+          "--memory",
+          "1024"
+        ],
+        [
+          "modifyvm",
+          "{{.Name}}",
+          "--cpus",
+          "2"
+        ]
+      ],
+      "virtualbox_version_file": ".vbox_version"
     }
   ],
   "post-processors": [
     {
-      "type": "vagrant",
-      "output": "nixos-14.02-x86_64-{{.Provider}}.box"
+      "output": "nixos-22.05-x86_64-{{.Provider}}.box",
+      "type": "vagrant"
+    }
+  ],
+  "provisioners": [
+    {
+      "execute_command": "sudo sh '{{.Path}}'",
+      "script": "scripts/postinstall.sh",
+      "type": "shell"
     }
   ]
 }
diff --git a/template.json.bak b/template.json.bak
new file mode 100644
index 0000000..0fe933c
--- /dev/null
+++ b/template.json.bak
@@ -0,0 +1,56 @@
+{
+  "builders": [
+    {
+      "type": "virtualbox-iso",
+      "boot_wait": "1m",
+      "boot_command": [
+        "root<enter>",
+        "stop sshd<enter>",
+        "fdisk /dev/sda<enter>",
+        "n",
+        "<enter><enter><enter><enter><enter>",
+        "a<enter>",
+        "1<enter>",
+        "w<enter>",
+        "<wait>",
+        "mkfs.ext4 -j -L nixos /dev/sda1<enter><wait5>",
+        "mount LABEL=nixos /mnt<enter><wait>",
+        "nixos-generate-config --root /mnt<enter><wait>",
+        "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/configuration.nix > /mnt/etc/nixos/configuration.nix<enter><wait>",
+        "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/guest-virtualbox.nix > /mnt/etc/nixos/guest.nix<enter><wait>",
+        "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/users-vagrant.nix > /mnt/etc/nixos/users.nix<enter><wait>",
+        "curl http://{{ .HTTPIP }}:{{ .HTTPPort }}/vagrant.nix > /mnt/etc/nixos/vagrant.nix<enter><wait>",
+        "nixos-install && reboot<enter>"
+      ],
+      "guest_additions_mode": "disable",
+      "guest_os_type": "Linux_64",
+      "http_directory": "nixos",
+      "iso_checksum": "aa9eeb04a491a84036368a93545400d79d16d281d4b7a29979bbb4f8476f9b81",
+      "iso_checksum_type": "sha256",
+      "iso_url": "https://releases.nixos.org/nixos/22.05/nixos-22.05.1700.365e1b3a859/nixos-minimal-22.05.1700.365e1b3a859-x86_64-linux.iso",
+      "shutdown_command": "sudo shutdown -h now",
+      "ssh_username": "root",
+      "ssh_key_path": "keys/vagrant.key",
+      "ssh_wait_timeout": "20m",
+      "virtualbox_version_file": ".vbox_version",
+      "vboxmanage": [
+        ["modifyvm", "{{.Name}}", "--memory", "1024"],
+        ["modifyvm", "{{.Name}}", "--cpus", "2"]
+      ]
+    }
+  ],
+  "provisioners": [
+    {
+      "type": "shell",
+      "execute_command": "sudo sh '{{.Path}}'",
+      "script": "scripts/postinstall.sh"
+    }
+  ],
+  "post-processors": [
+    {
+      "type": "vagrant",
+      "output": "nixos-22.05-x86_64-{{.Provider}}.box"
+    }
+  ]
+}
+