--- a/misc.py
+++ b/misc.py
@@ -2801,16 +2801,20 @@ def mirrorAndBundleArgs(config):
             args.extend(["--bundle", bundle])
     return args
 
 
 def generatePeriodicFileUpdateBuilder(config, branch_name, platform, base_name, slaves):
     pf = config['platforms'].get(platform, {})
     extra_args = ['-b', config['repo_path']]
 
+    env = pf['env'].copy()
+    kwargs = {}
+    kwargs['env'] = env
+
     extra_args += mirrorAndBundleArgs(config)
     if pf['product_name'] is not None:
         extra_args.extend(['-p', pf['product_name']])
     if config['hg_username'] is not None:
         extra_args.extend(['-u', config['hg_username']])
     if config['hg_ssh_key'] is not None:
         extra_args.extend(['-k', config['hg_ssh_key']])
     if config['file_update_on_closed_tree'] is True:
@@ -2825,16 +2829,17 @@ def generatePeriodicFileUpdateBuilder(co
         extra_args.extend(['--hpkp'])
 
     periodic_file_update_factory = ScriptFactory(
         "%s%s" % (config['hgurl'],
                   config['build_tools_repo_path']),
         'scripts/periodic_file_updates/periodic_file_updates.sh',
         interpreter='bash',
         extra_args=extra_args,
+        **kwargs
     )
     periodic_file_update_builder = {
         'name': '%s periodic file update' % base_name,
         'slavenames': slaves,
         'builddir': '%s-%s-periodicupdate' % (branch_name, platform),
         'slavebuilddir': normalizeName('%s-%s-periodicupdate' % (branch_name, platform)),
         'factory': periodic_file_update_factory,
         'category': branch_name,