feat(niri): add mako default (system) config

Cf. emersion/mako#557 and
emersion/mako#434

Author: johnrichardrinehart

nixos-modules/desktop/0001-feat-support-etc-mako-config.patch

@@ -0,0 +1,24 @@
+From 46ad7a9c98898e0e33504a216d35706003dd5d0f Mon Sep 17 00:00:00 2001
+From: John Rinehart <johnrichardrinehart@gmail.com>
+Date: Mon, 8 Dec 2025 14:35:46 -0500
+Subject: [PATCH] feat: support /etc/mako/config
+
+---
+ config.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/config.c b/config.c
+index 817f7e9..7f02139 100644
+--- a/config.c
++++ b/config.c
+@@ -755,6 +755,7 @@ static char *get_default_config_path() {
+ 	}
+ 
+ 	char *config_paths[] = {
++		mako_asprintf("/etc/mako/config"),
+ 		mako_asprintf("%s/.mako/config", home),
+ 		mako_asprintf("%s/mako/config", config_home),
+ 	};
+-- 
+2.51.2
+

nixos-modules/desktop/greetd+niri.nix

@@ -54,12 +54,16 @@ in
     services.greetd.settings.default_session.command = "${lib.getExe pkgs.tuigreet}";
     services.greetd.useTextGreeter = true;
 
-    environment.systemPackages = [
+    environment.systemPackages = let
+      myMako = pkgs.mako.overrideAttrs (old: {
+        patches = old.patches or [] ++ [ ./0001-feat-support-etc-mako-config.patch ];
+      });
+    in
+      [
       pkgs.alacritty
       pkgs.xwayland-satellite
       pkgs.fuzzel
       pkgs.grim
-      pkgs.mako
       pkgs.slurp
       pkgs.swaylock
       pkgs.xwayland-satellite
@@ -72,6 +76,8 @@ in
       pkgs.wl-clip-persist
       pkgs.wl-clipboard
       pkgs.cliphist
+    ] ++ [
+      myMako
     ];
 
     environment.etc."niri/config.kdl".source =
@@ -86,6 +92,7 @@ in
           checkPhase = null;
         });
     environment.etc."xdg/waybar".source = ./waybar;
+    environment.etc."mako/config".source = ./mako.conf;
 
     # Custom PAM config: fingerprint as first factor (rejects bad fingerprints),
     # then mandatory password - applied to greetd, sudo, and TTY logins

nixos-modules/desktop/mako.conf

@@ -0,0 +1,2 @@
+default-timeout=5000
+border-radius=5