| Index: build/config/mac/base_rules.gni | 
| diff --git a/build/config/mac/base_rules.gni b/build/config/mac/base_rules.gni | 
| index 074074eb347f1eb73e1b31e32a7a6f4711ebd52c..92e73a862f66a6b67320a739ae22dd7088e3da46 100644 | 
| --- a/build/config/mac/base_rules.gni | 
| +++ b/build/config/mac/base_rules.gni | 
| @@ -45,7 +45,14 @@ template("convert_plist") { | 
| outputs = [ | 
| invoker.output, | 
| ] | 
| -    args = [ | 
| +    args = [] | 
| +    if (!use_system_xcode) { | 
| +      args += [ | 
| +        "--developer_dir", | 
| +        hermetic_xcode_path, | 
| +      ] | 
| +    } | 
| +    args += [ | 
| "plutil", | 
| "-convert", | 
| invoker.format, | 
|  |