Usually, I always use `os.path.join` when working with paths, but in this case, I entered path according to sublime documentation (https://www.sublimetext.com/docs/3/api_reference.html) that states:
> The icon name may also be a full package relative path, such as Packages/Theme - Default/dot.png.

That is why I used this format. Also, folder when I have cloned Anaconda repo on my computer is called `Anaconda`, but I have tried changing it to `anaconda` and sublime is able to find icons. But this does not meat that it will work on all platforms (I am on windows at the momment). This should be tested on unix platforms (because of their file naming rules) and I will do it as soon as I get access to linux box. But I expect this to work on linux as well because it is not path on file system (icon can be in .sublime-package file) and I expect sublime to do the right thing. Unfortunately, I did not found any additional mention of it in sublime documentation.