No file/folder found for package langchain-monorepo

[zcw5116]

In the HOME directory of the langchain source code, execute the following command:
poetry install --with lint,typing,test

However, the following errors were thrown, and I have a few questions to ask:
(1) Why is it necessary to perform a downgrade operation on modules such as langchain-core, and how can we avoid downgrading?
(2) Why can't it find the module "langchain-monorepo"?
(3) How can the langchain source code be compiled in order to understand the principles of langchain and contribute code to langchain?

My development environment:
Python: Set up using conda, Python version 3.8.18
Langchain: GitHub's master branch.

The error message is as follows:

 poetry install --with lint,typing,test 
Installing dependencies from lock file

Package operations: 0 installs, 4 updates, 0 removals

  • Downgrading langchain-core (0.1.10 /home/xichen/data/pro/python/langchain-master/libs/core -> 0.1.3 /home/xichen/data/pro/python/langchain-master/libs/core)
  • Downgrading langchain-community (0.0.12 /home/xichen/data/pro/python/langchain-master/libs/community -> 0.0.6 /home/xichen/data/pro/python/langchain-master/libs/community)
  • Downgrading langchain (0.1.0 /home/xichen/data/pro/python/langchain-master/libs/langchain -> 0.0.352 /home/xichen/data/pro/python/langchain-master/libs/langchain)
  • Downgrading langchain-experimental (0.0.49 /home/xichen/data/pro/python/langchain-master/libs/experimental -> 0.0.47 /home/xichen/data/pro/python/langchain-master/libs/experimental)

Installing the current project: langchain-monorepo (0.0.1)
The current project could not be installed: No file/folder found for package langchain-monorepo
If you do not want to install the current project use --no-root

[rshah98626]

Having the same issue, not sure what the problem is, but the docs do not build either if this is the case.