Split package in name, version
    arch and build tag.

def split_package(package):
    """
    Split package in name, version
    arch and build tag.
    """
    name = ver = arch = build = []
    split = package.split("-")
    if len(split) > 2:
        build = split[-1]
        build_a, build_b = "", ""
        build_a = build[:1]
        if build[1:2].isdigit():
            build_b = build[1:2]
        build = build_a + build_b
        arch = split[-2]
        ver = split[-3]
        name = "-".join(split[:-3])
    return [name, ver, arch, build]