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--repair absolutely doesn't work with chroot stores #892

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opened 2025-06-30 00:03:37 +00:00 by raito · 0 comments
raito commented 2025-06-30 00:03:37 +00:00
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Describe the bug

--repair doesn't repair with chroot stores.

Steps To Reproduce

  1. nix-build -A something --store /tmp/a-chroot-store
  2. rm -rf /tmp/a-chroot-store/nix/store/some-dependency
  3. nix-build -A something --store /tmp/a-chroot-store --repair
  4. See failure

Expected behavior

Repair similar to when this is not a chroot store.

nix --version output

≤ 2.94.0-dev 286aa409b24e.

Additional context

This came up in the recovery attempts, reported by @delroth.

## Describe the bug `--repair` doesn't repair with chroot stores. ## Steps To Reproduce 1. `nix-build -A something --store /tmp/a-chroot-store` 2. `rm -rf /tmp/a-chroot-store/nix/store/some-dependency` 3. `nix-build -A something --store /tmp/a-chroot-store --repair` 4. See failure ## Expected behavior Repair similar to when this is not a chroot store. ## `nix --version` output ≤ 2.94.0-dev `286aa409b24e`. ## Additional context This came up in the recovery attempts, reported by @delroth.
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Affects/CppNix

Probably affects CppNix. This is a best-effort tag for troubles in old code; it exists to inform the CppNix team about problems they might care about also.

  
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Found in Lix nightly.

  
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Tag for regressions in Lix nightly. We intend to fix all of these prior to releases.

  
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Affects the stable release of Lix. Usually such issues affect nightly too but there is no guarantee.

  
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regarding the building or packaging of Lix itself

  
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The command line interface of Lix

  
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libexpr and anything else related to the evaluation of Nix expressions

  
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Area/language

language design, features, extensions, etc

  
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Lix's own CI and deployment pipeline

  
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nix-eval-jobs for Lix

  
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profiles: nix-env, nix profile, and installer flavors all alike

  
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The protocol, used for communicating between the client and the daemon

  
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remote builds

  
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The --debugger that brings up a Lix repl

  
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it's a bug

  
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crash 💥

Lix crashes (possibly bad error handling)

  
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development experience issues

  
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requires or is about documentation changes

  
Downstream Dependents

regarding an external tool's usage with Lix (e.g. nix-eval-jobs)

  
E/easy

bug is relatively simple and could simply be fixed with some minor effort

  
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this issue should probably be solved with close involvement of an expert

  
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maintainers may not get to this soon, but we want it fixed

  
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This bug is reproducible and obvious.

  
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this bug cannot be fixed properly without fixing a known architectural flaw

  
imported

Issue imported from upstream nix (please do not remove this label, it will cause dupes if import is rerun)

  
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Affects specifically Lix on Linux

  
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Affects specifically Lix on macOS

  
performance

make lix go faster

  
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We chose not to change this (see issue comments for more detail).

  
testing

Tests that should be added

  
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Tests that are unreliable/flakey (not to be confused with flakes that test)

  
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Large scale installations of Lix, e.g. NixOS Hydra, Lix CI, big corporate installations etc.

  
ux

makes the user experience better :)

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Reference: lix-project/lix#892
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