This folder contains files pertaining to the MSYS system. To install files distributed by MinGW we suggest you use the mingw-get installer https://sourceforge.net/projects/mingw/files/Installer/ and you can choose mingw-get or mingw-get-inst. Mingw-get-inst is a wrapper for mingw-get using InnoSetup, more can be found in the mingw-get-inst README file.