a variable file. To build a new java-builder instance the following would be done:
```
-packer build -var-file=vars/cloud-env.json -var-file/centos.json templates/java-builder.json
+packer build -var-file=vars/cloud-env.json -var-file=vars/centos.json templates/java-builder.json
```
**NOTE:** vars/cloud-env.json is a gitignored file as it contains private