Hi, using rancher desktop I am getting the following error when using buildkit:

=> [internal] load build definition from Dockerfile                                                                                                                                                 0.0s
 => => transferring dockerfile: 1.23kB                                                                                                                                                               0.0s
 => resolve image config for <http://docker.io/docker/dockerfile:1.4|docker.io/docker/dockerfile:1.4>                                                                                                                                         0.2s
 => CACHED <docker-image://docker.io/docker/dockerfile:1.4@sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc>                                                                    0.0s
 => => resolve <http://docker.io/docker/dockerfile:1.4@sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc|docker.io/docker/dockerfile:1.4@sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc>                                                                               0.0s
Dockerfile:1
--------------------
   1 | >>> # syntax=docker/dockerfile:1.4
--------------------
ERROR: failed to solve: exit code: 1

It seems to complain when using a custom dockerfile frontend. Any idea?