task jar(type: Jar) {
                archiveBaseName = project.name
                // TODO LJA: No idea why I have to do this
                if (project.version != 'unspecified') {
                    archiveFileName = "\${project.name}-\${project.version}.jar"
                }
                destinationDirectory = buildDir
            }
            artifacts { conf jar }
        }

----

Note that the archive name does _not_ derive from the task's name that creates it.

If you want to change the name and location of a generated archive file, you can provide values for the corresponding task's `archiveFileName` and `destinationDirectory` properties.
These override any conventions that would otherwise apply.

The deprecated `appendix`, `archiveName`, `archivePath`, `baseName`, `classifier`, `destinationDir`, `extension` and `version` properties of the `AbstractArchiveTask` task type have been removed.
Use the `archiveAppendix`, `archiveFileName` , `archiveFile`, `archiveBaseName`, `archiveClassifier`, `destinationDirectory`, `archiveExtension` and `archiveVersion` properties instead.

==== IdeaModule API Cleanup