def confirm_build(build_url, keeper_token):
data = {<EOL>'<STR_LIT>': True<EOL>}<EOL>r = requests.patch(<EOL>build_url,<EOL>auth=(keeper_token, '<STR_LIT>'),<EOL>json=data)<EOL>if r.status_code != <NUM_LIT:200>:<EOL><INDENT>raise KeeperError(r)<EOL><DEDENT>
Confirm a build upload is complete.

    Wraps ``PATCH /builds/{build}``.

    Parameters
    ----------
    build_url : `str`
        URL of the build resource. Given a build resource, this URL is
        available from the ``self_url`` field.
    keeper_token : `str`
        Auth token (`ltdconveyor.keeper.get_keeper_token`).

    Raises
    ------
    ltdconveyor.keeper.KeeperError
        Raised if there is an error communicating with the LTD Keeper API.