diff --git a/build.bat b/build.bat
index abc11be..060fdb3 100644
--- a/build.bat
+++ b/build.bat
@@ -1,4 +1,5 @@
 @ECHO OFF
+SET ISO_MD5_CHECKSUM=b0e3e198a12a2ae8efe89f5167655879
 SET VM_DESCRIPTION=A simplified Linux distribution built from containers, for containers
 SET VM_VERSION=1.0.0
-packer build -force -var "vm_description=%VM_DESCRIPTION%" -var "vm_version=%VM_VERSION%" "packer_rancheros.json"
+packer build -force -var "vm_description=%VM_DESCRIPTION%" -var "vm_version=%VM_VERSION%" -var "iso_md5_checksum=%ISO_MD5_CHECKSUM%" "packer_rancheros.json"
diff --git a/build.sh b/build.sh
index 1c546fd..31dcf99 100644
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
+iso_md5_checksum='b0e3e198a12a2ae8efe89f5167655879'
 vm_description='A simplified Linux distribution built from containers, for containers'
 vm_version='1.0.0'
 packer build \
+    -var "iso_md5_checksum=${iso_md5_checksum}" \
     -var "vm_description=${vm_description}" \
-    -var "vm_version=${vm_version}"         \
+    -var "vm_version=${vm_version}" \
     "packer_rancheros.json"
diff --git a/packer_rancheros.json b/packer_rancheros.json
index ba927ee..937b906 100644
--- a/packer_rancheros.json
+++ b/packer_rancheros.json
@@ -1,14 +1,16 @@
 {
   "variables": {
-    "vm_description": "",
-    "vm_version": ""
+    "iso_md5_checksum": "b0e3e198a12a2ae8efe89f5167655879",
+    "version_prerelease_suffix": "",
+    "vm_description": "A simplified Linux distribution built from containers, for containers",
+    "vm_version": "1.0.0"
   },
   "builders": [
     {
       "type": "virtualbox-iso",
       "guest_os_type": "Linux26_64",
-      "iso_url": "https://releases.rancher.com/os/v1.0.0/rancheros.iso",
-      "iso_checksum": "b0e3e198a12a2ae8efe89f5167655879",
+      "iso_url": "https://releases.rancher.com/os/v{{ user `vm_version` }}/rancheros.iso",
+      "iso_checksum": "{{user `iso_md5_checksum` }}",
       "iso_checksum_type": "md5",
       "guest_additions_mode": "disable",
       "ssh_private_key_file": "./keys/vagrant",
@@ -21,9 +23,9 @@
       "disk_size": "24000",
       "boot_wait": "30s",
       "boot_command": [
-        "echo \"#cloud-config                                                                                                                                                                                                                                                                                                                                                                                                                         \" >> cloud-config.yml<enter>",
-        "echo \"ssh_authorized_keys:                                                                                                                                                                                                                                                                                                                                                                                                                  \" >> cloud-config.yml<enter>",
-        "echo \"  - ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key          \" >> cloud-config.yml<enter>",
+        "echo \"#cloud-config\" >> cloud-config.yml<enter>",
+        "echo \"ssh_authorized_keys:\" >> cloud-config.yml<enter>",
+        "echo \"  - ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key\" >> cloud-config.yml<enter>",
         "sudo ros install -c cloud-config.yml -d /dev/sda<enter>",
         "y<enter>",
         "<wait5>",
@@ -35,7 +37,7 @@
         "--manifest",
         "--vsys", "0",
         "--description", "{{user `vm_description`}}",
-        "--version", "{{user `vm_version`}}.alpha1"
+        "--version", "{{user `vm_version`}}{{user `version_prerelease_suffix` }}"
       ],
       "vboxmanage": [
         [
@@ -69,9 +71,12 @@
         "artifact_type": "vagrant.box",
         "metadata": {
           "provider": "virtualbox",
-          "version": "{{user `vm_version`}}.alpha1"
+          "version": "{{user `vm_version`}}{{user `version_prerelease_suffix`}}"
         }
       }
     ]
-  ]
+  ],
+  "push": {
+    "name": "MatthewHartstonge/RancherOS"
+  }
 }