Nixpkgs version

• Unstable (26.05)

Describe the bug

The derivation nix-functional-tests is failing to build during nixos-rebuild switch --flake ...

This causes failures in derivations named nix, lazy-options.json, options.json, nixos-manual-html, nixos-configuration-reference-manpage, nixos-help, and others.

Steps to reproduce

Run nixos-rebuild using nixpkgs at commit 8c809a146a140c5c8806f13399592dbcb1bb5dc4. Nothing in my configuration has changed since the last successful nixos-rebuild except the nixpkgs flake input. Several of the packages listed as depending on the failed derivation are ones that are not directly enabled in my config.

Expected behaviour

The packages in question should build successfully.

Screenshots

No response

Relevant log output

./stale-file-handle-inner.sh: test failed at:                                                                                                      
  main in ./stale-file-handle-inner.sh:40                                                                                                          
 Summary of Failures:                                                                                                                               
 201/201 local-overlay-store - nix-functional-tests:stale-file-handle        FAIL            1.45s   exit status 1

Additional context

No response

System metadata

• system: "x86_64-linux"
• host os: Linux 6.19.0, NixOS, 26.05 (Yarara), 26.05.20260213.a82ccc3
• multi-user?: yes
• sandbox: yes
• version: nix-env (Lix, like Nix) 2.94.0 System type: x86_64-linux Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux Features: gc, signed-caches System configuration file: /etc/nix/nix.conf User configuration files: /home/jeremy/.config/nix/nix.conf:/nix/store/rh4zf44gppzng6y2xxiq1d3k8k0hd9jn-cinnamon-settings-daemon-6.6.3/etc/xdg/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/jeremy/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/jeremy/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/jeremy/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf Store directory: /nix/store State directory: /nix/var/nix Data directory: /nix/store/g50ix07jnnx47bvskvlsjv6b3s986ns3-lix-2.94.0/share
• channels(jeremy): "home-manager-23.05.tar.gz"
• channels(root): "my-config, nixpkgs-stable-23.11"
• nixpkgs: /etc/current-nixpkgs

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