* `g++` 4.7 or later or `clang++` 3.x
* `python` 2.7 (but not 3.x)
* GNU `make` 3.81 or later
+ * `cmake` 2.8.8 or later
* `curl`
* `git`
3. Run `mingw32_shell.bat` or `mingw64_shell.bat` from wherever you installed
MSYS2 (i.e. `C:\msys`), depending on whether you want 32-bit or 64-bit Rust.
+ (As of the latest version of MSYS2 you have to run `msys2_shell.cmd -mingw32`
+ or `msys2_shell.cmd -mingw64` from the command line instead)
4. Navigate to Rust's source code, configure and build it: