Add buildx again.

.travis.yml

@@ -47,11 +47,13 @@ before_script:
   - sudo mv daemon.json /etc/docker/daemon.json
   - sudo systemctl restart docker
   - docker version
+  - docker build --platform=local -o . git://github.com/docker/buildx
+  - mv buildx ~/.docker/cli-plugins/docker-buildx
 
 # Run the build and packaging
 script:
   - docker build --build-arg METACALL_GUIX_VERSION="1.0.1" --build-arg METACALL_GUIX_ARCH="x86_64" .
 
-# Upload to Docker the built images
+# Upload the built images to DockerHub
 after_script:
-
+  # TODO

Dockerfile

@@ -1,4 +1,4 @@
-# syntax = docker/dockerfile:1.0-experimental
+# syntax = docker/dockerfile:1.1-experimental
 
 #
 #	MetaCall Guix by Parra Studios