refactor into modules

nixos/modules/services/flatpak.nix

@@ -0,0 +1,5 @@
+{ ... }:
+
+{
+  services.flatpak.enable = true;
+}

nixos/modules/services/printing.nix

@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+
+{
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
+
+  services.printing = {
+    enable = true;
+    drivers = with pkgs; [
+      cups-filters
+      cups-browsed
+    ];
+  };
+}

nixos/modules/services/smb.nix

@@ -0,0 +1,5 @@
+{ ... }:
+
+{
+  services.gvfs.enable = true;
+}

nixos/modules/services/ssh.nix

@@ -0,0 +1,5 @@
+{ ... }:
+
+{
+  services.openssh.enable = true;
+}