Unable to resolve groovy.json classes when planting

With the latest release of the archetype generator, projects that have a post-generation script that import from other packages not in groovy core fail to build with an error similar to the following:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:3.1.0:generate (default-cli) on project standalone-pom: startup failed:
[ERROR] Script1.groovy: 1: unable to resolve class groovy.json.JsonException
[ERROR]  @ line 1, column 1.
[ERROR]    import groovy.json.JsonException
[ERROR]    ^
[ERROR]

This used to work in the previous version: 3.0.1 of the archetype-plugin.

Suspected change that introduced this backwards incompatibility:
https://github.com/apache/maven-archetype/commit/11cb603da9d3da813c0a34a9e2532cc2c85f940b#diff-a6aa95e2d0a1da7b4460e2506c2e67daR56

Essentially, with https://issues.apache.org/jira/browse/ARCHETYPE-536 it looks like the groovy dependency went from 1.8.3 to 2.4.16 and groovy split modules from groovy core with the 2.x release. There is a groovy-all package that could be used.