unsupported tarball input attribute 'lastModified'

[behaghel]

I get this error below after using the template verbatim with nix run. I was initially migrating manually my config to nixos-unified and was stuck on the same error when I decided to stand on solid ground with the template.

❯ nix run
warning: unknown experimental feature 'configurable-impure-env'
2024-11-02T23:59:29.326|INF|currentSystem=aarch64-darwin currentHost=tfmbp targetHost=tfmbp hostData={outputs: {nixArgs: [], overrideInputs: {}, system: aarch64-darwin}, overrideInputs: [], sshTarget: , host: tfmbp, flake: /nix/store/as724w61zqb09vjqma6zalxcizxazzwv-nixos-unified-activate-flake#tfmbp}
2024-11-02T23:59:29.330|INF|Activating locally
2024-11-02T23:59:29.330|INF|>>> darwin-rebuild switch --flake /nix/store/as724w61zqb09vjqma6zalxcizxazzwv-nixos-unified-activate-flake#tfmbp
warning: unknown experimental feature 'configurable-impure-env'
error:
       … while updating the lock file of flake 'path:/nix/store/as724w61zqb09vjqma6zalxcizxazzwv-nixos-unified-activate-flake?lastModified=1&narHash=sha256-Svd7CjSPyI7dBerMp73ujU6SykpxRJZCrjx4Q%2BkL4pU%3D'

       error: unsupported tarball input attribute 'lastModified'

[srid]

@behaghel What is your Nix version?

[behaghel]

Hi @srid, initially with 2.18.1, I then suspected something and tried with version 2.24.10. Both display identical behaviour as reported above.

[behaghel]

I have uninstalled and reinstalled nix entirely on this MBP and it seems to have helped. Will report in a few.

[behaghel]

Indeed. That reinstall made the problem disappear. Thanks for your support!

[srid]

Perhaps you had two different versions of Nix installed? I recall this issue appearing with older Nix.