Install this repository via Package Control
If stylish-haskell executable is not in your PATH - use add_to_PATH setting (or same setting in Sublime Haskell package)
To stylish your haskell code run this commands:
- OS X:
If selection is empty and configuration entry use_entire_file_if_no_selection is true, tries to prettify whole file.
use_entire_file_if_no_selection - true add_to_PATH - empty list