They call `buildXCodeProject` directly, so if a workspace is set (via set-webkit-configuration), xcodebuild is passed both a `-workspace` parameter and a `-project` parameter.
rdar://97615725
Pull request: https://github.com/WebKit/WebKit/pull/2757
Committed 252857@main (b03221eccffc): <https://commits.webkit.org/252857@main> Reviewed commits have been landed. Closing PR #2757 and removing active labels.