feat(option-functions): add packageOption

Author: yunfachi

lib/option-functions.nix

@@ -72,10 +72,17 @@ in {
   portOption = name: default:
     lib.mkOption {
       inherit default;
-      description = "Whether to specifiy ${name}.";
+      description = "Whether to specify ${name}.";
       type = lib.types.port;
     };
 
+  packageOption = name: default:
+    lib.mkOption {
+      inherit default;
+      description = "Whether to specify ${name}.";
+      type = lib.types.package;
+    };
+
   enumOption = name: default: values:
     lib.mkOption {
       inherit default;