Python 在heroku上安装opencv:编译的slug大小太大

我想使用以下构建包在heroku上安装opencv for my face detection node.js应用程序：

所以我就这么做了：

heroku buildpack:set https://github.com/slobdell/heroku-buildpack-python-opencv

但随后我将收到以下错误：

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Fetching custom git buildpack... done
remote: -----> Python + OpenCV + Numpy + Scipy app detected
remote: -----> Generating environment
remote:        Fetching...
remote:        Unpacking...
remote: -----> Creating environment variables.
remote: -----> Buildpack installed.
remote: -----> Discovering process types
remote:        Procfile declares types -> monitor, receive
remote: 
remote: -----> Compressing... 


remote:  !   Compiled slug size: 548.5MB is too large (max is 300MB).


remote:  !   See: http://devcenter.heroku.com/articles/slug-size
remote:  !     Push failed: slug archive could not be created
remote:  !     Please try pushing again.
remote:  !     If the problem persists, see http://help.heroku.com/ and provide Request ID 3123dc0c-3f9f-4da1-9223-16531769b6ae.
remote: 
remote: 
remote: Verifying deploy...
remote: 
remote: !   Push rejected to arcane-hollows-8678.
remote: 

---

我完全不知道我做错了什么。据我所知，我会让我的heroku应用程序上传opencv和我的应用程序，然后压缩它。但是我如何影响opencv的大小呢？

为什么要将其标记为

node.js

？