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NixOS configuration overlays
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{ config, pkgs, ... }: | |
let | |
# Import unstable channel. | |
# sudo nix-channel --add http://nixos.org/channels/nixpkgs-unstable nixpkgs-unstable | |
# sudo nix-channel --update nixpkgs-unstable | |
unstable = import <nixpkgs-unstable> {}; | |
in | |
{ | |
environment.systemPackages = | |
[ pkgs.hello # regular channel | |
unstable.spotify # newer version from nixpkgs-unstable | |
]; | |
virtualisation.libvirtd.enable = true; | |
nixpkgs.overlays = | |
[ (self: super: | |
{ | |
# override with newer version from nixpkgs-unstable | |
qemu = unstable.qemu; | |
# custom package that depends on hello from nixpkgs-unstable | |
foo = super.callPackage ./pkgs/foo { inherit (unstable) hello; }; | |
}) | |
]; | |
} |
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