anchor.diff:        throw Exception(buf.toString());
       }
   
  -    final ProcessResult result = await process.run(imgtestInitCommand);
  +    final ProcessResult result = await _runCommand(imgtestInitCommand);
   
       if (result.exitCode != 0) {
         final StringBuffer buf = StringBuffer()
  
positive.code:         ..writeln('stderr: ${result.stderr}');
        throw Exception(buf.toString());
      }
    }
  
    /// Executes the `imgtest init` command in the `goldctl` tool.
  
negative.code:     await failures.create();
      final String commitHash = await _getCurrentCommit();
  
      final List<String> tryjobInitCommand = <String>[
        _goldctl,
        'imgtest', 'init',
        '--instance', _instance,
  