```sh
# Update package mirrors (may be needed if you have a fresh install of MSYS2)
- $ pacman -Sy&&pacman -S pacman-mirrors
-
+ $ pacman -Sy pacman-mirrors
+
# Choose one based on platform:
$ pacman -S mingw-w64-i686-toolchain
$ pacman -S mingw-w64-x86_64-toolchain