Derivation read fails with chroot stores

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Description

nix-output-monitor error: DerivationReadError /nix/store/d8sbf9afdpg05bak61lm1qyc3sjgqlq0-linux-config-6.1.51.drv: openFile: does not exist (No such file or directory)

Contributor guide

Research direction

Investigate the DerivationReadError in the nix output monitor codebase. Look for the function that reads .drv files (likely in a file like Nix/Derivation.hs) and how it handles store paths when a chroot store is used. The error indicates the file does not exist at the expected path, so check if there is a missing prefix or different store path logic. Examine the openFile call and ensure it resolves the path correctly for chroot stores. Consider adding support for alternate store paths or adjusting the path resolution logic. The issue has no linked PRs, so initial investigation should focus on the source code and possibly testing with the provided reproduction command.

Tech stack

None

Domain

clibackend

Issue type

Bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

Half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

Stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

Clear

Prerequisites

HaskellBasic understanding of NixKnowledge of chroot stores

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

30