What is msysGit? msysGit is the development environment to compile Git for Windows. It is complete, in the sense that you just need to install msysGit, and then you can build Git. Without installing any 3rd-party software. msysGit is not Git for Windows; that is an installer which installs Git -- and only Git. It is easy to see the difference: the installers for Git have the prefix Git-, the msysG