build do
  Rscons::Environment.new do |env|
    env["CSUFFIX"] = %w[.yargh .c]
    env["CFLAGS"] += %w[-x c]
    env["CPPPATH"] += Rscons.glob("src/**")
    env.Program("program.exe", Rscons.glob("src/**/*.{c,yargh}"))
  end
end