readme: clarify flake instructions #388
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lilyinstarlight
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| If you have an existing `configuration.nix`, you can use the `nixos-cosmic` flake with the following in an adjacent `flake.nix` (e.g. in `/etc/nixos`): | ||
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| **Note:** If switching from traditional evaluation to flakes, `nix-channel` will no longer have any effect on the nixpkgs your system is built with, and therefore `nixos-rebuild --upgrade` will also no longer have any effect. You will need to use `nix flake update` from your flake directory to update nixpkgs and nixos-cosmic. |
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| @@ -6,17 +6,25 @@ Dedicated development matrix room: <https://matrix.to/#/#cosmic:nixos.org> | |||
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| ## Usage | |||
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| ### With traditional evaluation | |||
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| This isn't supported, you are required to use [nix flakes] if you want to use nixos-cosmic. | |||
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So uh this isn't true either. There is a valid entrypoint intended for that use-case, it's just undocumented and a bad idea unless you are using some other pinning/locking mechanism, e.g. npins
I'll provide more concrete guidance later on what this can be changed to, though. Thanks for working on these docs!
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