from typing import Dict


def to_nvre(build_record: Dict):
    """
    From a build record object (such as an entry returned by listTagged),
    returns the full nvre in the form n-v-r:E.
    """
    nvr = build_record['nvr']
    if 'epoch' in build_record and build_record["epoch"] and build_record["epoch"] != 'None':
        return f'{nvr}:{build_record["epoch"]}'
    return nvr