broken conda 4.3.11

[dodysw]

Referring to #9

I'm using conda 4.3.11 and the output is now different, so this patch is not working because it's returning a dict instead of string:

$ conda list -f ^oracle-instantclient$ --json
[
  {
    "base_url": null,
    "build_number": 1,
    "build_string": "1",
    "channel": "dody",
    "dist_name": "oracle-instantclient-11.2.0.4.0-1",
    "name": "oracle-instantclient",
    "platform": null,
    "version": "11.2.0.4.0",
    "with_features_depends": null
  }
]