--- a/taskcluster/taskgraph/transforms/task.py
+++ b/taskcluster/taskgraph/transforms/task.py
@@ -956,26 +956,28 @@ def build_task(config, tasks):
 
         # add the payload and adjust anything else as required (e.g., scopes)
         payload_builders[task['worker']['implementation']](config, task, task_def)
 
         attributes = task.get('attributes', {})
         attributes['run_on_projects'] = task.get('run-on-projects', ['all'])
 
         # Set MOZ_AUTOMATION on all jobs.
+        # Also expose the job name as MOZ_JOB_NAME
         if task['worker']['implementation'] in (
             'generic-worker',
             'docker-engine',
             'native-engine',
             'docker-worker',
         ):
             payload = task_def.get('payload')
             if payload:
                 env = payload.setdefault('env', {})
                 env['MOZ_AUTOMATION'] = '1'
+                env['MOZ_JOB_NAME'] = task['label']
 
         yield {
             'label': task['label'],
             'task': task_def,
             'dependencies': task.get('dependencies', {}),
             'attributes': attributes,
             'optimizations': task.get('optimizations', []),
         }