opt: mmsg as passthru

flake.nix

@@ -26,8 +26,8 @@
       ];
 
       flake = {
-        hmModules.maomaowm = import ./nix/hm-modules.nix { inherit self; };
-        nixosModules.maomaowm = import ./nix/nixos-modules.nix { inherit inputs self; };
+        hmModules.maomaowm = import ./nix/hm-modules.nix self;
+        nixosModules.maomaowm = import ./nix/nixos-modules.nix self;
       };
 
       perSystem =
@@ -41,7 +41,8 @@
             callPackage
             ;
           maomaowm = callPackage ./nix {
-            wlroots = inputs.nixpkgs-wayland.packages.${pkgs.system}.wlroots;
+            inherit (inputs.nixpkgs-wayland.packages.${pkgs.system}) wlroots;
+            inherit (inputs.mmsg.packages.${pkgs.system}) mmsg;
           };
           shellOverride = old: {
             nativeBuildInputs = old.nativeBuildInputs ++ [ ];

nix/default.nix

@@ -16,6 +16,7 @@
   meson,
   ninja,
   wlroots,
+  mmsg,
 }:
 let
   pname = "maomaowm";
@@ -51,6 +52,7 @@ stdenv.mkDerivation {
 
   passthru = {
     providedSessions = [ "maomao" ];
+    inherit mmsg;
   };
 
   meta = {

nix/hm-modules.nix

@@ -1,4 +1,4 @@
-{ self }:
+self:
 {
   lib,
   config,

nix/nixos-modules.nix

@@ -1,4 +1,4 @@
-{ inputs, self }:
+self:
 {
   config,
   lib,
@@ -7,16 +7,6 @@
 }:
 let
   cfg = config.programs.maomaowm;
-  mmsg = lib.types.submodule {
-    options = {
-      enable = lib.mkEnableOption "Enable mmsg, the ipc for maomaowm";
-      package = lib.mkOption {
-        type = lib.types.package;
-        default = inputs.mmsg.packages.${pkgs.system}.mmsg;
-        description = "The mmsg package to use";
-      };
-    };
-  };
 in
 {
   options = {
@@ -27,42 +17,31 @@ in
         default = self.packages.${pkgs.system}.maomaowm;
         description = "The maomaowm package to use";
       };
-      mmsg = lib.mkOption {
-        type = mmsg;
-        default = {
-          enable = true;
-        };
-        description = "Options for mmsg, the ipc for maomaowm";
-      };
     };
   };
 
-  config = lib.mkMerge [
-    (lib.mkIf cfg.enable {
-      environment.systemPackages = [ cfg.package ];
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = [
+      cfg.package
+    ] ++ (if (builtins.hasAttr "mmsg" cfg.package) then [ cfg.package.mmsg ] else [ ]);
 
-      xdg.portal = {
-        enable = lib.mkDefault true;
+    xdg.portal = {
+      enable = lib.mkDefault true;
 
-        wlr.enable = lib.mkDefault true;
+      wlr.enable = lib.mkDefault true;
 
-        configPackages = [ cfg.package ];
-      };
+      configPackages = [ cfg.package ];
+    };
 
-      security.polkit.enable = lib.mkDefault true;
+    security.polkit.enable = lib.mkDefault true;
 
-      programs.xwayland.enable = lib.mkDefault true;
+    programs.xwayland.enable = lib.mkDefault true;
 
-      services = {
-        displayManager.sessionPackages = [ cfg.package ];
+    services = {
+      displayManager.sessionPackages = [ cfg.package ];
 
-        graphical-desktop.enable = lib.mkDefault true;
-      };
+      graphical-desktop.enable = lib.mkDefault true;
+    };
 
-    })
-
-    (lib.mkIf cfg.mmsg.enable {
-      environment.systemPackages = [ cfg.mmsg.package ];
-    })
-  ];
+  };
 }