I'm noticing that when installing packages declaratively via
configuration.nix and nixos-rebuild, some packages are install one way,
but others are installed another way. For example:
# Some packages are installed via environment.systemPackages
environment.systemPackages = with pkgs; [
wget firefox thunderbird git
];
# Others are installed via *.enabled = true;
services.openssh.enable = true;
services.printing.enable = true;
services.xserver.enable = true;
services.xserver.displayManager.kdm.enable = true;
services.xserver.desktopManager.kde4.enable = true;
services.vmwareGuest.enable = true;
What exactly is the difference? Is there any more nuance to it than
"Services are installed one way, non-services are installed the other way"?
How do I know which way to install a given package? Especially if I'm
not sure offhand whether a given package involves a service component.
Can all packages be installed wither way? Are all packages ONLY one way
or the other?
How can I find what packages are available via one method or the other?
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