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Nix feature doesn't work on GitHub Codespaces universal image #275
Description
Cross-post of existing issue report for visibility: NixOS/nix#6680 (comment)
Cross-post of existing issue report for visibility: NixOS/nix#6680 (comment)
Activity
Chuxel commentedon Nov 11, 2022
There seems to be some sort of interaction with the
universalimage here that needs to be investigated. The Dev Container Feature does work with other images (as you can see in the test battery). Will investigate further.[-]Nix feature doesn't work on GitHub Codespaces[/-][+]Nix feature doesn't work on GitHub Codespaces universal image[/+]CSchank commentedon Mar 14, 2023
Is there a workaround to this? Until February 14th it was working for us on base:jammy, but now it gives a similar error and falls back on the fallback image.
Chuxel commentedon Apr 19, 2023
Christopher William Schankula (@CSchank) Hmm. I am currently able to build using
mcr.microsoft.com/devcontainers/base:jammyandmcr.microsoft.com/devcontainers/base:bullseye. Its possible there was an issue with a specific version of nix.[nix] docs: Note it's broken on universal base image (but works on base)
vorburger commentedon Nov 23, 2025
In enola-dev/enola#1921 (comment), I can confirm this; I've raised #1517 to clarify this on docs, just because this confused the hell out of me at first, until I figured what's what; maybe this helps others in the future (until this is fully resolved).