diff --git a/.github/workflows/github-build.yml b/.github/workflows/github-build.yml
index a451ebf..34f418b 100644
--- a/.github/workflows/github-build.yml
+++ b/.github/workflows/github-build.yml
@@ -24,5 +24,5 @@ jobs:
         env:
           DOCKER_CLI_EXPERIMENTAL: enabled
         run: |
-          curl -fsSL https://raw.githubusercontent.com/pschmitt/ci-setup-docker-buildx/master/setup.sh | bash
-          ./.github/workflows/build.sh
+          bash ./.github/workflows/setup.sh |
+          bash ./buildx.sh
\ No newline at end of file
diff --git a/.github/workflows/setup.sh b/.github/workflows/setup.sh
new file mode 100644
index 0000000..022f2d7
--- /dev/null
+++ b/.github/workflows/setup.sh
@@ -0,0 +1,182 @@
+#!/usr/bin/env bash
+
+MIN_DOCKER_VERSION=${MIN_DOCKER_VERSION:-19.03}
+
+usage() {
+  echo "$(basename "$0")"
+}
+
+is_travis() {
+  [[ "$TRAVIS" == "true" ]]
+}
+
+is_github_actions() {
+  [[ "$GITHUB_ACTIONS" == "true" ]]
+}
+
+is_ci() {
+  is_travis || is_github_actions
+}
+
+install_dependencies() {
+  if is_ci
+  then
+    apt update
+    apt install -y jq
+  fi
+}
+
+get_docker_version() {
+  docker version --format '{{json .}}' | jq -r '.Client.Version'
+}
+
+check_docker_version() {
+  local version
+
+  version="$(get_docker_version)"
+  if [[ -z "$version" ]]
+  then
+    echo "Unable to determine installed Docker version" >&2
+    return 1
+  fi
+  [[ "$(echo -e "$version\n$MIN_DOCKER_VERSION" | sort -V | head -1)" == "$MIN_DOCKER_VERSION" ]]
+}
+
+update_docker() {
+  if check_docker_version
+  then
+    echo "Docker is up to date: local=$(get_docker_version) min=$MIN_DOCKER_VERSION"
+    return
+  fi
+
+  if is_travis
+  then
+    # FIXME Wouldn't "curl -fsSL https://get.docker.com | bash" be enough?
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+    sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+    sudo apt-get update
+    sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
+  elif is_github_actions
+  then
+    curl -fsSL https://get.docker.com | \
+      sed -r 's/sleep [0-9]+/sleep 0.1/' | \
+      bash
+  fi
+}
+
+setup_docker() {
+  # Append experimental: true to docker cli config
+  local config=~/.docker/config.json
+
+  if [[ -e "$config" ]]
+  then
+    if [[ "$(jq -r '.experimental?' "$config")" == "null" ]]
+    then
+      jq '. + {"experimental": "enabled"}' "$config" > "${config}.new"
+      mv "${config}.new" "$config"
+    fi
+  else
+    mkdir -p "$(dirname "$config")"
+    echo '{"experimental": "enabled"}' > "$config"
+  fi
+
+  export DOCKER_CLI_EXPERIMENTAL=enabled
+}
+
+get_latest_buildx_version() {
+  # Prefer local script
+  if ! [[ -x ./git-latest-version.sh ]]
+  then
+    # Download
+    curl -O -L https://raw.githubusercontent.com/pschmitt/ci-setup-docker-buildx/master/git-latest-version.sh
+    chmod +x ./git-latest-version.sh
+  fi
+  ./git-latest-version.sh docker/buildx
+}
+
+install_latest_buildx() {
+  local arch
+  local buildx_path=~/.docker/cli-plugins/docker-buildx
+  local version
+
+  version="${BUILDX_VERSION:-$(get_latest_buildx_version)}"
+
+  if [[ -x "$buildx_path" ]]
+  then
+    return
+  fi
+
+  case "$(uname -m)" in
+    x86_64)
+      arch=amd64
+      ;;
+    aarch64)
+      arch=arm64
+      ;;
+    armv6l|arm)
+      arch=arm-v6
+      ;;
+    armv7l|armhf)
+      arch=arm-v7
+      ;;
+    *)
+      arch="$(uname -m)"
+      ;;
+  esac
+  mkdir -p "$(dirname "$buildx_path")"
+  curl -L -o "$buildx_path" \
+    "https://github.com/docker/buildx/releases/download/v${version}/buildx-v${version}.linux-${arch}"
+  chmod +x "$buildx_path"
+}
+
+debug_info() {
+  env
+  docker version
+  docker buildx ls
+  docker buildx inspect
+  ls -1 /proc/sys/fs/binfmt_misc
+}
+
+setup_buildx() {
+  case "$(uname -m)" in
+    x86_64|i386)
+      docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+      # docker run --rm --privileged docker/binfmt:a7996909642ee92942dcd6cff44b9b95f08dad64
+      ;;
+  esac
+
+  # CI
+  if is_ci
+  then
+    docker buildx create \
+      --use \
+      --name builder \
+      --node builder \
+      --driver docker-container \
+      --driver-opt network=host
+  fi
+  docker buildx inspect --bootstrap
+
+  # Debug info for buildx and multiarch support
+  debug_info
+}
+
+set -ex
+
+echo "Starting docker buildx setup"
+update_docker
+setup_docker
+
+if ! [[ -x ~/.docker/cli-plugins/docker-buildx ]]
+then
+  install_latest_buildx
+  setup_buildx
+fi
+
+if ! docker buildx version >/dev/null
+then
+  echo "buildx is not available" >&2
+  exit 99
+fi
+
+# vim set et ts=2 sw=2 :
\ No newline at end of file
diff --git a/.github/workflows/build.sh b/buildx.sh
similarity index 100%
rename from .github/workflows/build.sh
rename to buildx.sh