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In NixOS how can I manage the system installed packages?

If I run nix-env -q from root I get the packages installed by root (and available to all the users), but many are missing like ssh, the whole kde, the kernel and so on.

Also, how is this "system-profile" handled? Is it upgraded when I upgrade with nix-env -u '*'?

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for system packages on nixos it is probably best to keep then in configuration.nix file (environment.systemPackages)

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    Also, how is this "system-profile" handled? It's part of the system evaluation, so it's only switched by nixos-rebuild; e.g. all versions are consistent in the system. – Vladimír Čunát Jun 4 '16 at 22:02
  • for every change you do in your configuration.nix you need to trigger nixos-rebuild. The same is true when you add/remove packages from environment.systemPackages list. – Rok Garbas Jun 17 '16 at 8:14

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