This breaks transifex-client, which requires python-slugify<3.0.0.

cc @etu

This breaks transifex-client, which requires python-slugify<3.0.0.

Sigh, that damn package. It probably doesn't require that really. It has made lots of absurd claims in the past. I'll look into this tomorrow at work (in about 8-9 hours or so). I already patch the package to get rid of some of the absurd claims of required versions of deps. But yeah, I need it so I'll fix it somehow.

A number of platforms failed to initialize for me:

• darksky
• pushover
• broadlink
• onkyo

Error setting up platform pushover

Traceback (most recent call last):
  File "/nix/store/1zvaffg7c9n2nwyqsfnsram172h8jqal-homeassistant-0.92.0/lib/python3.7/site-packages/homeassistant/components/notify/__init__.py", line 71, in async_setup_platform
    platform.get_service, hass, p_config, discovery_info)
  File "/nix/store/kimimvhimclyfzlncpg36zjni3wn70nq-python3-3.7.3/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/nix/store/1zvaffg7c9n2nwyqsfnsram172h8jqal-homeassistant-0.92.0/lib/python3.7/site-packages/homeassistant/components/pushover/notify.py", line 26, in get_service
    from pushover import InitError
ModuleNotFoundError: No module named 'pushover'

Ahh wait, while this is the package used, the module is still the one from stable and thus without the mentioned commit.

@dotlambda I have tested building transifex locally, and changing this line:

Tried again:

ModuleNotFoundError: No module named 'forecastio'

If I add the component in extra packages then works.

The nixpkgs version used to build your system, not the one Home Assistant is built from, must include the patch. That's because it's the NixOS module's task to detect the used components.
Maybe we could change this so that the package is passed autoExtraComponents and config.

I understand, I really like to select which packages I prefer bleeding edge in my system without affecting system wide. So I can keep with my workaround. Or do you know how can I override only that module?

That patch will be backported to 19.03, so you won't have to change anything. But for testing, you have to build from a local nixpkgs checkout of your channel with the patch appied.

I'll merge on 2019-05-05 20:00 UTC if there's no further comment until then.