--- a/process/release.py
+++ b/process/release.py
@@ -2020,19 +2020,18 @@ def generateReleasePromotionBuilders(bra
             'name': buildername,
             'slavenames': branch_config['platforms']['macosx64']['slaves'],
             'category': category_name,
             'builddir': buildername,
             'slavebuilddir': normalizeName(buildername),
             'factory': partner_repack_factory,
             'properties': {
                 'branch': branch_name,
-                'platform': platform,
+                'platform': 'macosx64',
                 'product': product,
-                'basedir': normalizeName(buildername),
             }
         })
 
     # Don't merge release builder requests
     nomergeBuilders.update([b['name'] for b in builders])
 
     # Make sure builders have the right properties
     addBuilderProperties(builders)