Note that you might want to document which FPC binary dirs you have in the %PATH% on startup, since it seems to grab just the default "fpc" binary. (I assume it is FPC 3.0.0 release)
Maybe showing fpc -iV on startup?
P.s. If you use FPC 3.0.0 you can strip the -dwin9xplatform, since that would be pointless.