Flask not found after nix update

[engagepy]

Problem description:

• Repl not working after upgrading to nix.

• Installed module flask, error: module not foundon run

• Unable to uninstall and reinstall module, error: replit operation error

Trying to install via shell, pip install flask

An error occurred during configuration: option use-feature: 
invalid choice: 'content-addressable-pool' 
(choose from '2020-resolver', 'fast-deps', 'in-tree-build')

Expected behavior:

• Repl that was working perfectly runs in new environment as is.

• Since all dependencies are installed as per package manager installed list.

[QwertyQwerty88]

You can’t use sudo in a Repl, just use pip install flask.

[engagepy]

I pasted the wrong error message, please see now.

[QwertyQwerty88]

Hm, can you send a link to your REpl?

[ShaneAtReplit]

Hey @engagepy!

We have seen a few of these issues before. Following these steps should fix it, but please let me know if they don’t:

Nix migration causes Pygame project to become unuseable

I was able to get the Repl working in these three steps: Deleted the __pycache__ folder Set the .replit file to this:

.replit contents

# The command that runs the program. If the interpreter field is set, it will have priority and this run command will do nothing run = "python3 main.py" # The primary language of the repl. There can be others, though! language = "python3" entrypoint = "main.py" # A list of globs that specify which files and directories should # be…

[QwertyQwerty88]

@engagepy

Solved Laboriously :

• copy project directory (manually & tediously) to new python repl
• since it starts a fresh with new nix env
• copy secrets
• copy packages
• Run

OP Messaged me with the solution