Couldn't find a valid ICU package installed on the system.

[0paIescent]

Environment Data

• VS Code Version: 1.37.1
• Extension Version: 2019.8.30787
• OS Version: NixOS Unstable 19.09pre190139
• Python Version: 3.7.4

Expected Behavior, Steps to Reproduce, and Logs match those described in microsoft/vscode-python#2967.

This is less of a help me fix something, and more of me just wondering what version of ICU is supported with vscode-python. I wasn't able to find anything relating to it in the extension source, but maybe I didn't look hard enough. I currently have ICU 64.2 but when loading the extension I'm told I don't have a valid version. I've since set "python.jediEnabled": true for the time being.

[MikhailArkhipov]

Check #170 for a workaround - you can disable libicu lookup.

[jakebailey]

Our requirements are just what dotnet asks for. As far as I'm aware, if you're able to run VS Code, the libicu version it requires is good enough for the language server, but there are still quirks past that.

Since you're on NixOS, if the version of VS Code you're running is fully built to run in Nix (with the non-standard sofile locations), the version of the language server that gets downloaded will likely not follow that same system, since it's not compiled in that same way.

[MikhailArkhipov]

Yes, VS Code lays down compatible libicu. In other cases one may have to either

• install Linux dependencies manually: https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x.
• install .NET Core 2.2+ runtime.
• disable libicu lookup per Add support for LS inside of Docker containers #170.