Problem generating Elemental sources

Getting this stack trace when trying to run the generate target on elemental:

[john@vaadin elemental]$ ant generate
Buildfile: /home/john/Repositories/gwt/trunk/elemental/build.xml

generate:
     [exec] Traceback (most recent call last):
     [exec]   File "idl/scripts/elemental_fremontcutbuilder.py", line 217, in <module>
     [exec]     sys.exit(main())
     [exec]   File "idl/scripts/elemental_fremontcutbuilder.py", line 214, in main
     [exec]     return build_database(idl_files, database_dir)
     [exec]   File "idl/scripts/elemental_fremontcutbuilder.py", line 139, in build_database
     [exec]     builder.import_idl_file(file_name, webkit_options)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/databasebuilder.py", line 472, in import_idl_file
     [exec]     idl_file = self._load_idl_file(file_path, import_options)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/databasebuilder.py", line 83, in _load_idl_file
     [exec]     defines=import_options.idl_defines)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/idlparser.py", line 444, in parse
     [exec]     content = self._pre_process(content, defines, includePaths)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/idlparser.py", line 424, in _pre_process
     [exec]     stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     [exec]   File "/usr/lib64/python2.7/subprocess.py", line 672, in __init__
     [exec]     errread, errwrite)
     [exec]   File "/usr/lib64/python2.7/subprocess.py", line 1202, in _execute_child
     [exec]     raise child_exception
     [exec] OSError: [Errno 2] No such file or directory
     [exec] Traceback (most recent call last):
     [exec]   File "idl/scripts/elementaldomgenerator.py", line 164, in <module>
     [exec]     sys.exit(main())
     [exec]   File "idl/scripts/elementaldomgenerator.py", line 155, in main
     [exec]     database_dir, use_database_cache)
     [exec]   File "idl/scripts/elementaldomgenerator.py", line 120, in GenerateDOM
     [exec]     systems = systems)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/elementalgenerator.py", line 279, in Generate
     [exec]     self.PopulateMixinBase(self._database.GetInterface('ElementalMixinBase'), mixins)
     [exec]   File "/home/john/Repositories/gwt/trunk/elemental/idl/scripts/database.py", line 188, in GetInterface
     [exec]     raise RuntimeError('Interface %s is not loaded' % interface_name)
     [exec] RuntimeError: Interface ElementalMixinBase is not loaded

Running against the latest GWT trunk (rev 11195) with Python 2.7.1 on a Linux (Fedora 15) platform.

Any ideas?

-- John

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