marimo-lsp/vscode extension can't create a connection to the server due to inaccessible index

[viseryon]

Describe the bug

When starting, the marimo extension will send requests to pypi for packages like pygls or marimo. However, I work in corporate environment where we use internal package index (PyPi proxy/mirror), which is the only allowed index. This causes all requests to fail and extension to not work at all.

please advice what can I do to make the extension work properly :)

marimo extension version 0.13.5

in pyproject.toml file I set uv to use our index via

[[tool.uv.index]]
url = "https://repo.work.pl/repository/proxy-pypi.org/simple"

but marimo doesn't respect this setting.

Is there a way to add a setting to marimo to point it to a desired index? In pyproject.toml maybe?

I also attach marimo outputs. Let me know if you need anything else. Thanks

marimo
2026-07-16 10:05:25.122 [info] Using bundled uv: c:\Users\me\.vscode\extensions\marimo-team.vscode-marimo-0.13.5-win32-x64\bundled\libs\bin\uv.exe 0.11.3 (45da18ac3 2026-04-01)
2026-07-16 10:05:25.122 [info] No source resolved a binary, using fallback: uv install [server=ty, source=uv install]
2026-07-16 10:05:25.122 [info] Language server started [server=ruff, version=0.15.21]
2026-07-16 10:06:58.608 [warning] Failed to sync theme [error={"exec":{"command":"c:\\Users\\me\\.vscode\\extensions\\marimo-team.vscode-marimo-0.13.5-win32-x64\\bundled\\libs\\bin\\uv.exe","args":["tool","run","--python","3.13","--from","c:\\Users\\me\\.vscode\\extensions\\marimo-team.vscode-marimo-0.13.5-win32-x64\\dist\\marimo_lsp-0.1.0","marimo-lsp"]},"cause":{"code":-32097},"stderr":"error: Request failed after 3 retries in 47.3s\n  Caused by: Failed to fetch: `https://pypi.org/simple/pygls/`\n  Caused by: error sending request for url (https://pypi.org/simple/pygls/)\n  Caused by: client error (Connect)\n  Caused by: operation timed out","exit":{"code":2,"signal":null},"_tag":"LanguageClientStartError"}]

marimo (uv)
Using CPython 3.13.12
error: Request failed after 3 retries in 47.6s
  Caused by: Failed to fetch: `https://pypi.org/simple/ty/`
  Caused by: error sending request for url (https://pypi.org/simple/ty/)
  Caused by: client error (Connect)
  Caused by: operation timed out

marimo (lsp)
2026-07-16 10:06:11.872 [error] error: Request failed after 3 retries in 47.3s
2026-07-16 10:06:11.872 [error]   Caused by: Failed to fetch: `https://pypi.org/simple/pygls/`
2026-07-16 10:06:11.872 [error]   Caused by: error sending request for url (https://pypi.org/simple/pygls/)
2026-07-16 10:06:11.872 [error]   Caused by: client error (Connect)
2026-07-16 10:06:11.872 [error]   Caused by: operation timed out
2026-07-16 10:06:11.895 [error] Server initialization failed.
  Message: Pending response rejected since connection got disposed
  Code: -32097 
2026-07-16 10:06:11.895 [info] Connection to server got closed. Server will restart.
2026-07-16 10:06:11.896 [error] Marimo Language Server client: couldn't create connection to server.
  Message: Pending response rejected since connection got disposed
  Code: -32097 

Environment

Details

marimo VS Code Extension Diagnostics
=====================================

Language Server (LSP):
	UV Bin: Bundled (c:\Users\me\.vscode\extensions\marimo-team.vscode-marimo-0.13.5-win32-x64\bundled\libs\bin\uv.exe)
	UV: 0.11.3 (45da18ac3 2026-04-01) ✓
	Using bundled marimo-lsp via uvx

Python Extension:
	Interpreter: c:\Users\me\Documents\my_project\.venv\Scripts\python.exe
	Version: 3.11.4 (main, Jul 26 2023, 12:14:30) [MSC v.1929 64 bit (AMD64)]
	Environment: VirtualEnvironment (.venv)

Python Language Server (ty):
	Status: failed ✗
	Error: Failed to start language server

Ruff Language Server:
	Status: running ✓
	Version: 0.15.21
	Binary: CompanionExtension/bundled (charliermarsh.ruff, c:\Users\me\.vscode\extensions\charliermarsh.ruff-2026.60.0-win32-x64\bundled\libs\bin\ruff.exe)

Extension Configuration:
	Version: 0.13.5 
	UV integration disabled: false 

System Information:
	Host: desktop 
	IDE: Visual Studio Code 
	IDE version: 1.127.0 
	Platform: win32 
	Architecture: x64 
	Node version: v24.15.0 

Common Issues:
	1. If notebooks won't open:
		- Check Python interpreter is selected
		- Ensure marimo is installed
		- Check 'marimo-lsp' output channel for errors
	2. If features are missing:
		 - Ensure marimo version is >= 0.23.3
		- Try reloading the window

Steps to reproduce

No response