Weird date in Nixvim flake

[refaelsh]

Whenever I do a sudo nixos-rebuild switch --flake ~/repos/dotfiles/#myNixos --option eval-cache false, I get the following output:

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• Updated input 'nixvim':
    'path:/nix/store/g5dvas65d1h4h5jljh7qszh3kil3bys5-source/nixvim?lastModified=1&narHash=sha256-aBZc7rnbEwyRwhWWvMkKIXL2V2%2BpsSDrDOO/rSt61Do%3D' (1970-01-01)
  → 'path:/nix/store/malllcsmhchmi53y8waa6p0r1rv7qckv-source/nixvim?lastModified=1&narHash=sha256-aBZc7rnbEwyRwhWWvMkKIXL2V2%2BpsSDrDOO/rSt61Do%3D' (1970-01-01)
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What's up with the weird date of 1970-01-01? Did I stumble on a bug?

Thanks :-)

P.S.
Also, I wanted to ask question number 2: I get the Updated input 'nixvim' every time I rebuild my NixOS. Is that normal that I get this every time, in spite of the fact I changed nothing in my various flakes/nix files?

[siph]

What's up with the weird date of 1970-01-01? Did I stumble on a bug?

That's the unix epoch: https://en.wikipedia.org/wiki/Unix_time

[refaelsh]

But why is so? Should it not be something like 21/09/2024 or something?

[HeitorAugustoLN]

This is the default of lastModified attribute for flake inputs. See https://nix.dev/manual/nix/2.22/command-ref/new-cli/nix3-flake.html?highlight=epoch#flake-reference-attributes

[refaelsh]

Then I am guessing that Nixvim's CI/CD does not update this field. Possible bug?

[HeitorAugustoLN]

No, it is due to your flake input being a local path without git. So it just uses the default value.

[refaelsh]

I understand. Thank you!

[HeitorAugustoLN]

No problem :)