Commit 633a0cced0fdd4626edd43a6f1498ad7d3f0a22c "#178: Don't always show the 32bit on Win64 warning" causes compilation to fail. In particular, KEY_OPTIONS_VERSION, KEY_WARNING_WOW64, and KEY_UPDATE_CHECKED_ON are not defined in the sources.
should be fixed now. Could you try if it works on *nix?
Confirmed, it now compiles.