A proper way to export delivery template from UAT to Production using packages.

Hello everyone,

Does anyone know a proper way to export delivery templates from UAT to Production using packages. What we are doing is, creating a package definition, then adding the template to be exported using following method:  right click on package -> actions - > add to package definition. Then exporting the package from UAT and import the package in Production. The packages are imported successfully, but while executing a delivery using the imported package, execution gets failed giving out following error:

Our best guess is, this is caused due to images included in the template. As the path/ link for the images in the template is of UAT server, the system cannot find the path/ link in Production server. Is there any step we are missing out or something we are doing wrong ? Any help is appreciated.