Poetry打包Python命名空间包：novi_activations无法随pip安装

背景 #

我开发了一个开源Python包，已发布到PyPI，使用Poetry完成打包与发布工作。src目录结构如下：

- src
   |- novi
       |- client
       |    |- __init__.py
       |- core
       |    |- __init__.py
       |- web
       |    |- __init__.py    
   |- novi_activations

novi和novi_activations均为Python命名空间包，它们的根目录下没有直接的__init__.py文件。

问题与尝试过程 #

1. 最初的pyproject.toml配置：

[tool.poetry]
name = "novi"
version = "0.4.5"
description = "A simple yet powerful feature flag and multivariate testing platform built in Python"
authors = ["vdevigere <vdevigere+git@gmail.com>"]
readme = "README.md"
packages = [
    {include = "novi", from="src"},
]
include =[
    {path="src/novi_activations"}
]
.....

生成的tar包结构正常，novi与novi_activations都被包含在内，但用户执行pip install novi后，只有novi包被成功安装，novi_activations并未被安装。

2. 尝试将novi_activations加入packages配置：

[tool.poetry]
name = "novi"
version = "0.4.5"
description = "A simple yet powerful feature flag and multivariate testing platform built in Python"
authors = ["vdevigere <vdevigere+git@gmail.com>"]
readme = "README.md"
packages = [
    {include = "novi", from="src"},
    {include = "novi_activations", from="src"}
]
......

此时直接报错，提示novi_activations不是一个包。

我知道可以通过在novi_activations目录下添加虚拟包的方式解决问题，但不想采用这种方案，求其他可行的解决办法。

内容的提问来源于stack exchange，提问作者VDev