niri: add systemd units to the right location

They will then be moved to `share` by https://nixos.org/manual/nixpkgs/unstable/#move-systemd-user-units.sh
and a symlink will be put in place.

Author: r-vdp

pkgs/by-name/ni/niri/package.nix

@@ -88,7 +88,7 @@ rustPlatform.buildRustPackage rec {
     ''
     + lib.optionalString withSystemd ''
       install -Dm0755 resources/niri-session -t $out/bin
-      install -Dm0644 resources/niri{-shutdown.target,.service} -t $out/share/systemd/user
+      install -Dm0644 resources/niri{-shutdown.target,.service} -t $out/lib/systemd/user
     '';
 
   env = {