sudo amazon-linux-extras install
Traceback (most recent call last):
  File "/usr/lib64/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/site-packages/amazon_linux_extras/__main__.py", line 35, in <module>
    sys.exit(cli_main([arg for arg in argv[1:] if arg != "-v"]))
  File "/usr/lib/python2.7/site-packages/amazon_linux_extras/cli.py", line 419, in main
    action(args)
  File "/usr/lib/python2.7/site-packages/amazon_linux_extras/cli.py", line 245, in cmd_install
    catalog = get_catalog(insist_stable_ordinal=any(re.match(r"^[0-9]+$", arg) for arg in args))
  File "/usr/lib/python2.7/site-packages/amazon_linux_extras/software_catalog.py", line 120, in get_catalog
    catalog = fetch_new_catalog()
  File "/usr/lib/python2.7/site-packages/amazon_linux_extras/software_catalog.py", line 92, in fetch_new_catalog
    url = CATALOG_URL.format(**yumvars)
KeyError: u'basearch'