Hex dependency resolution issues

[aesmail]

I'm trying to use ex_twilio v0.1.7 with phoenix v1.1.4
There's an issue with poison versions that both apps require:

Conflict on poison from 1.5.0 to 1.5.2
  ecto 1.1.5: ~> 1.0
  ex_twilio 0.1.7: >= 2.0.0
  phoenix 1.1.4: ~> 1.5 or ~> 2.0
  phoenix_ecto 2.0.1: ~> 1.3

Conflict on poison from 2.0.0 to 2.1.0
  phoenix 1.1.4: ~> 1.5 or ~> 2.0
  phoenix_ecto 2.0.0, 2.0.1: ~> 1.3

** (Mix) Hex dependency resolution failed, relax the version requirements or unlock dependencies

[danielberkompas]

Ecto 2.0 will rely on the newer Poison. In the meantime, you can override the dependency by adding poison to your mix dependencies like so:

{:poison, "~> 2.0", override: true}

That should solve the problem.