Thanks for the heads-up but I wish to buy it on GOG. It's available in Steam: http://store.steampowered.com/app/748680/Hand_of_Fate_2_Soundtrack
I like my stuff in one place. In the meantime I've ripped the Soundtrack from shared_music assets file. Will buy it whenever it appears on the store here.
Personally, I recommend buying it on Bandcamp. The music there is DRM free, so no point for waiting for it to be released ere. Besides, you can download it with various qualities and formats there.
Also, the soundtrack is on Spotify, where I have listened to it. If you have Spotify Premium, you can download it to your device, but it can be played only with the app.