In the ebuild : >=dev-python/pbr-0.5.16[${PYTHON_USEDEP}] <dev-python/pbr-0.6[${PYTHON_USEDEP}] In the requirements.txt from upstream : pbr>=0.5.21,<1.0 ( https://github.com/openstack/python-troveclient/blob/1.0.4/requirements.txt ) Thanks!
Sorry i was confused between 0.1.4 and 1.0.4 :)