apycot #9209064 Can't specify which changeset to use on buildexp cwo [open]

buildexp cwo : https://www.cubicweb.org/testconfig/2137952

example error : https://www.cubicweb.org/testexecution/9208934 (I asked the recipe to test my draft cs and there are no public cs in this repo - so far).

Traceback

Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/narvalbot/engine.py", line 102, in _run_plan
  narvalplan.run()
File "/usr/lib/python2.7/dist-packages/narvalbot/engine.py", line 140, in run
  execfile(f.name, {'plan': self})
File "/tmp/tmpNKP12O.py", line 7, in <module>
File "/usr/lib/python2.7/dist-packages/apycotlib/narvalactions.py", line 23, in install_environment
  test.checkout(dep)
File "/usr/lib/python2.7/dist-packages/apycotlib/atest.py", line 235, in checkout
  cwd=self.tmpdir).run()
File "/usr/lib/python2.7/dist-packages/apycotlib/__init__.py", line 279, in run
  self.handle_output(cmd.returncode, outfile, None)
File "/usr/lib/python2.7/dist-packages/apycotlib/__init__.py", line 309, in handle_output
  raise SetupException(short_msg) `hg clone -q http://hg.logilab.org/review/cubes/piwik/ && hg -R /tmp/tmpOyEd5y/piwik up   '::. and public()'` returned with status : 255

code for recipe at the time of writing is

from checkers.apycot import python, scenarios, debcheck, lgp # trigger registration
from checkers.jpl import jpl # trigger registration
from apycotlib import narvalactions as na
from apycotlib import SUCCESS, FAILURE, PARTIAL, NODATA, ERROR

with na.apycot_environment(plan) as test:
  na.install_environment(test)
  pylint, status = test.run_checker('pylint')
  pyunit, status = test.run_checker('pyunit', pycoverage=True)
  if status > ERROR and status != NODATA:
      pycov, status = test.run_checker('pycoverage',
                                       coverage_data=pyunit.coverage_data)
  checker, status = test.run_checker('lgp.check')
  build, status = test.run_checker('lgp.build')
  lintian, status = test.run_checker('lintian', changes_files=build.debian_changes)
  rsync, status = test.run_checker('jpl.rsync', changes_files=build.debian_changes, rpm_files=build.rpms)