Changes sysupdate to package instead of shell.

packages/sysupdate/default.nix

@@ -0,0 +1,25 @@
+{
+  pkgs,
+  ...
+}:
+
+pkgs.writeShellApplication {
+  name = "sysupdate";
+
+  runtimeInputs = with pkgs; [
+    nix-output-monitor nixos-rebuild home-manager
+  ];
+
+  text = ''
+    NIXCONF="''${NIXCONF:-.}"
+    echo Building config from flake at: "$NIXCONF" 1>&2
+    [[ "''${1:-}" == "home" ]] && \
+      home-manager switch -L --flake "$NIXCONF" |& nom && \
+      exit 0
+    [ "$EUID" -eq 0 ] && \
+      nixos-rebuild switch --log-format internal-json -v --flake "$NIXCONF" |& nom --json && \
+      exit 0
+    echo Please rerun as root. 1>&2
+    exit 1
+  '';
+}

shells/sysupdate/default.nix

@@ -1,21 +0,0 @@
-{
-  pkgs,
-  inputs,
-  ...
-}:
-
-pkgs.mkShell {
-  packages = with pkgs; [
-    nix-output-monitor nixos-rebuild home-manager
-  ];
-
-  NIXCONF = inputs.self;
-
-  shellHook = ''
-    alias sysupdate-nixos='sudo echo -n; sudo nixos-rebuild switch --log-format internal-json -v --flake "$NIXCONF" |& nom --json'
-    alias sysupdate-home='home-manager switch -L --flake "$NIXCONF" |& nom'
-    echo System Update Shell for flake at $NIXCONF
-    echo Run 'sysupdate-nixos' to update system,
-    echo then 'sysupdate-home' to update user profile.
-  '';
-}