hope this works

modules/nixos/hardware/graphics/vulkan/hasvk13_layer.json

@@ -0,0 +1,14 @@
+{
+    "file_format_version": "1.1.2",
+    "layer": {
+        "name": "VK_LAYER_hasvk13_version_override",
+        "type": "GLOBAL",
+        "library_path": "@out@/lib/libVkLayer_hasvk13.so",
+        "api_version": "1.3.0",
+        "implementation_version": "1",
+        "description": "Vulkan 1.3.348 implict layer.",
+        "disable_environment": {
+            "DISABLE_HASVK13_LAYER": "1"
+        }
+    }
+}