Cleanroom Error

****** Running "testing" hooks.
 FAIL  Generation of "system-kirstine" asserted.

Error report:
>>>>>> Flushing buffer:
++++++ /home/paul/systems/system-kirstine.def:50 "Create initrd": Executing "create_initrd" "/home/paul/clrm/work/scratch/boot/initrd-parts/50-mkinitcpio".
++++++ Mapped system path "usr/bin/mkinitcpio" to "/home/paul/clrm/work/scratch/fs/usr/bin/mkinitcpio".
 FAIL  Generation of "system-kirstine" asserted.

>>>>>> End of Buffer <<<<<<


Traceback Information:
  File "/home/paul/dev/cleanroom/cleanroom/generator.py", line 91, in generate_systems
    storage_directory=work_directory.storage_directory)
  File "/home/paul/dev/cleanroom/cleanroom/executor.py", line 52, in run
    *exec_obj.args, **exec_obj.kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 102, in <lambda>
    __execute_func(command, loc, sc, *args, **kwargs))
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 89, in __execute_func
    command(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 207, in __call__
    self.prepare_for_export(location, system_context)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 243, in prepare_for_export
    has_kernel = self._create_initramfs(location, system_context)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 365, in _create_initramfs
    '50-mkinitcpio'))
  File "/home/paul/dev/cleanroom/cleanroom/command.py", line 116, in _execute
    command_info.execute_func(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 102, in <lambda>
    __execute_func(command, loc, sc, *args, **kwargs))
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 89, in __execute_func
    command(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commands/create_initrd.py", line 404, in __call__
    _deviceify(system_context.substitution('IMAGE_DEVICE', ''))
  File "/home/paul/dev/cleanroom/cleanroom/commands/create_initrd.py", line 33, in _deviceify
    assert device.startswith('/dev/')


>>>>>> END OF ERROR REPORT <<<<<<
Traceback (most recent call last):
  File "/home/paul/dev/cleanroom/cleanroom/generator.py", line 91, in generate_systems
    storage_directory=work_directory.storage_directory)
  File "/home/paul/dev/cleanroom/cleanroom/executor.py", line 52, in run
    *exec_obj.args, **exec_obj.kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 102, in <lambda>
    __execute_func(command, loc, sc, *args, **kwargs))
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 89, in __execute_func
    command(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 207, in __call__
    self.prepare_for_export(location, system_context)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 243, in prepare_for_export
    has_kernel = self._create_initramfs(location, system_context)
  File "/home/paul/dev/cleanroom/cleanroom/commands/export.py", line 365, in _create_initramfs
    '50-mkinitcpio'))
  File "/home/paul/dev/cleanroom/cleanroom/command.py", line 116, in _execute
    command_info.execute_func(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 102, in <lambda>
    __execute_func(command, loc, sc, *args, **kwargs))
  File "/home/paul/dev/cleanroom/cleanroom/commandmanager.py", line 89, in __execute_func
    command(location, system_context, *args, **kwargs)
  File "/home/paul/dev/cleanroom/cleanroom/commands/create_initrd.py", line 404, in __call__
    _deviceify(system_context.substitution('IMAGE_DEVICE', ''))
  File "/home/paul/dev/cleanroom/cleanroom/commands/create_initrd.py", line 33, in _deviceify
    assert device.startswith('/dev/')
AssertionError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/paul/dev/cleanroom/clrm", line 13, in <module>
    main.run()
  File "/home/paul/dev/cleanroom/cleanroom/main.py", line 72, in run
    main(*sys.argv)
  File "/home/paul/dev/cleanroom/cleanroom/main.py", line 142, in main
    repository_base_directory=args.repository_base_directory)
  File "/home/paul/dev/cleanroom/cleanroom/generator.py", line 93, in generate_systems
    self._report_error(system_name, e, ignore_errors=ignore_errors)
  File "/home/paul/dev/cleanroom/cleanroom/generator.py", line 41, in _report_error
    ignore_errors=ignore_errors)
  File "/home/paul/dev/cleanroom/cleanroom/generator.py", line 58, in _report_error_details
    original_exception=exception)
cleanroom.exceptions.GenerateError: Error: Generation failed.
    Trigger: AssertionError.