When trying to build forge locally or on CI, we can see

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-dependency-plugin:2.4:copy (get-runtime) on project org.jboss.tools.forge2.runtime: Unable to find artifact. Failure to find org.jboss.forge.addon:shell-api:jar:2.0.0.CR1 in http://repository.jboss.org/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of jboss-public-repository-group has elapsed or updates are forced
[ERROR]
[ERROR] Try downloading the file manually from the project website.
[ERROR]
[ERROR] Then, install it using the command:
[ERROR] mvn install:install-file -DgroupId=org.jboss.forge.addon -DartifactId=shell-api -Dversion=2.0.0.CR1 -Dpackaging=jar -Dfile=/path/to/file
[ERROR]
[ERROR] Alternatively, if you host your own repository you can deploy the file there:
[ERROR] mvn deploy:deploy-file -DgroupId=org.jboss.forge.addon -DartifactId=shell-api -Dversion=2.0.0.CR1 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
[ERROR]
[ERROR]
[ERROR] org.jboss.forge.addon:shell-api:jar:2.0.0.CR1
[ERROR]
[ERROR] from the specified remote repositories:
[ERROR] jboss-public-repository-group (http://repository.jboss.org/nexus/content/groups/public/, releases=true, snapshots=true),
[ERROR] jboss-snapshots-repository (https://repository.jboss.org/nexus/content/repositories/snapshots/, releases=true, snapshots=true),
[ERROR] jboss-releases (https://repository.jboss.org/nexus/content/repositories/releases/, releases=true, snapshots=true),
[ERROR] central (http://repo.maven.apache.org/maven2, releases=true, snapshots=false)
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :org.jboss.tools.forge2.runtime