o3de/Gems/Atom/Tools/MaterialCanvas/Registry/user_minimal_shader_build.setregstub

{
    "Amazon": {
        "AssetProcessor": {
            "Settings": {
                "Platform pc": {
                    "tags": "tools,renderer,vulkan"
                },
                "Platform linux": {
                    "tags": "tools,renderer,vulkan"
                },
                "Platform android": {
                    "tags": "android,mobile,renderer,vulkan"
                },
                "Platform ios": {
                    "tags": "mobile,renderer,metal"
                },
                "Platform mac": {
                    "tags": "tools,renderer,metal"
                }
            }
        }
    },
    "O3DE": {
        "Atom": {
            "Shaders": {
                "BuildVariants": false
            }
        }
    }
}