Some workaround has to be done here. Anaconda can be installed as "Anaconda" (mostly when it is installed using Package Control) and "anaconda", this ico_path should be more dynamic that it is now. By the way, I suggest to use the operating system agnonstic method `os.path.join` to build any type of path inside anaconda.

You can always use something like:
    `ico_path = os.path.join(os.path.dirname(__file__), '../../gutter_mark_themes/{theme}-{type}.png')`