This is the English version of WindowsでHaskellを扱う時によく遭遇するエラーと対処法. The original article is the 4th article of Haskell (その4) Advent Calendar 2017 (Japanese). What I’m going to tell is summarized as just one tweet (originally in Japanese): What I’ve learned: chcp65001 if ‘Invalid character’ rebuild if ‘Permission Denied’ Don’t mix Japanese characters in file paths. Some libraries in C are available,