In pipelines, environment variables from withEnv() are ignored

[Artalus]

If you try to use the plugin from Pipeline via step([$class: 'PhabricatorNotifier']) it seems it requires PHID and DIFF_ID strictly in build parameters. Even if you try to wrap the step in withEnv(["DIFF_ID=$x", "PHID=$target"]) { ... }, the build will report that Harbormaster integration not enabled for this build.