Using semver to build application name dynamically


I have a task which deploys to PCF. One of the input values is the location of the artifact to deploy, it requires the full name and version of the artifact. I want to be able use the semver version to create the file name dynamically. I need something like this:

artifact_repo: name-((version/version)).jar

However Concourse doesn’t see the semver as an expression. Is there another way i can do this? I don’t have the option to modify the task