def METHOD_NAME(proc_path):
    """Extract build number from host .exe file
    Args:
        proc_path (str): full path of the host .exe file
    Returns:
        str: build number (e.g. '20170927_1515(x64)')
    """
    # Revit 2021 has a bug on .VersionBuild
    ## it reports identical value as .VersionNumber
    pinfo = TargetApps.Revit.RevitProductData.GetBinaryProductInfo(proc_path)
    return "{}({})".format(pinfo.build, pinfo.target) \
        if pinfo.build else "20000101_0000(x64)"