fix khd service

modules/launchd/default.nix

@@ -35,7 +35,7 @@ let
         path = mkOption {
           type = types.listOf types.path;
           default = [];
-          apply = ps: makeBinPath ps;
+          apply = ps: "${makeBinPath ps}";
           description = ''
             Packages added to the service's <envar>PATH</envar>
             environment variable.  Both the <filename>bin</filename>

modules/services/khd.nix

@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.khd;
+
+in
+
+{
+  options = {
+    services.khd = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to enable the khd hototkey daemon.";
+      };
+
+      package = mkOption {
+        type = types.path;
+        default = pkgs.khd;
+        description = "This option specifies the khd package to use";
+      };
+
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    launchd.user.agents.khd = {
+      serviceConfig.Program = "${cfg.package}/bin/khd";
+      serviceConfig.KeepAlive = true;
+      serviceConfig.ProcessType = "Interactive";
+      serviceConfig.Sockets.Listeners =
+        { SockServiceName = "3021";
+          SockType = "dgram";
+          SockFamily = "IPv4";
+        };
+    };
+
+  };
+}