forked from pub-solar/os
40 lines
1.2 KiB
Markdown
40 lines
1.2 KiB
Markdown
# Overrides
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Each NixOS host follows one channel. But many times it is useful to get packages
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or modules from different channels.
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This is what the overrides are for. You can make use of the `overrides.nix` to
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override specific packages to be pulled from other channels. Any overlay may get
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`channels` as their first argument.
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## Example
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### Packages
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The override packages are defined as a regular overlay with an extra arguement
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`channels`. This refers to all channels defined in `flake.nix`.
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Pulling the manix package from the latest flake:
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```nix
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channels: final: prev: {
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inherit (pkgs.latest) manix;
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}
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```
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### Modules
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You can also pull modules from other channels. All modules have access to the
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`modulesPath` for each channel as `<channelName>ModulesPath`. And you can use
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`disabledModules` to remove modules from the current channel.
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Pulling the zsh module from the latest flake:
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```nix
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{ latestModulesPath }: {
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modules = [ "${latestModulesPath}/programs/zsh/zsh.nix" ];
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disabledModules = [ "programs/zsh/zsh.nix" ];
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}
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```
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> ##### _Note:_
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> Sometimes a modules name will change from one branch to another.
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[nixpkgs-modules]: https://github.com/NixOS/nixpkgs/tree/master/nixos/modules
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