Using nginx upload module and nginx lua together

I am using nginx upload module for uplaoding files to server. But I wanted nginx to upload to different paths, not to a path mentioned in upload_store.
So I am taking help of nginx-lua module to change the upload_store value on each request like below.

location /umtest {
            upload_pass /nginx_response;
            set $upload_store '';
            rewrite_by_lua '
                local header = ngx.req.raw_header()
                ngx.say("type header",header)
                dst_path_dir = ngx.req.get_headers()["Dst-Dir"]
                ngx.say("dst_path_dir",dst_path_dir)
                ngx.var.upload_store = dst_path_dir
                ngx.say("upload store path" ,ngx.var.upload_store)    
             ';
                upload_set_form_field $upload_field_name.name 
               "$upload_file_name";
                upload_set_form_field $upload_field_name.content_type 
                "$upload_content_type";
                upload_set_form_field $upload_field_name.path 
                "$upload_tmp_path"
                upload_cleanup 400 404 499 500-505;
               }

Now when I POST to the '/umtest' it will change the upload_store value, but it will not execute the nginx upload direcives (i.e., upload will not happen). When I comment the rewrite_by_lua directive , the upload happens.
My question is cant we use both at a same time to achieve the purpose?

Start with the nginx configuration for location /umtest, especially rewrite_by_lua, upload_pass, upload_store, and the upload directives. Reproduce the POST with rewrite_by_lua enabled and disabled, then inspect how the Lua rewrite phase interacts with the nginx upload module. Done means establishing whether both can run together for the requested path selection, or documenting the limitation if they cannot.