34 lines
1.2 KiB
Markdown
34 lines
1.2 KiB
Markdown
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---
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title: "Error: unsupported tarball input attribute 'lastModified'"
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date: 2024-09-10 22:35:41
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tags: [Linux, Nix, NixOS]
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links:
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- https://discourse.nixos.org/t/error-unsupported-tarball-input-attribute-lastmodified/49435/4
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---
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Yesterday, my laptop died and I needed to resurrect a spare laptop to work on.
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This laptop was running an outdated version of NixOS, old packages, a different window manager and other things, so I tried to update it to bring it up to date so it's up to date with my dead laptop's configuration.
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Doing so, though, gave me this error:
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> Error: unsupported tarball input attribute ‘lastModified’
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A normal `sudo nixos-rebuild switch` worked, but trying to use a Flake was generating the error.
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I was able to get it working after running these commands from a Discourse thread:
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```shell
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nix shell "github:NixOS/nix/2.18.4"
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nix build .#nixosConfigurations.nixedo.config.system.build.toplevel
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sudo nix-env --profile /nix/var/nix/profiles/system --set ./result
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./result/bin/switch-to-configuration switch
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```
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I also needed to add `--experimental-features 'nix-command flakes'` to the `nix` commands to get them to run.
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Once this finished, I was able to reboot and get a running up-to-date configuration.
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