message: farm/configure: subprocess.run is not supported before Python 3.5
diff: @@ -176,7 +176,7 @@ with open('%s/.drake.tmp' % options.build_dir, 'w') as drake:
  build_dir = options.build_dir
  tmp = '%s/.drake.tmp' % build_dir
  drake = '%s/drake' % build_dir
  -subprocess.run(['diff', '-u', drake if os.path.isfile(drake) else '/dev/null', tmp])
  +subprocess.call(['diff', '-u', drake if os.path.isfile(drake) else '/dev/null', tmp])
  shutil.move(tmp, drake)
  # chmod +x
  os.chmod(drake, os.stat(drake).st_mode | stat.S_IEXEC)
  