diff --git a/.github/workflows/docker_build_dev_image.yml b/.github/workflows/docker_build_dev_image.yml
index fb35ade..6c4e3ea 100644
--- a/.github/workflows/docker_build_dev_image.yml
+++ b/.github/workflows/docker_build_dev_image.yml
@@ -42,14 +42,7 @@ jobs:
           chmod +x manifest-tool
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1.2.0
-        with:
-          image: multiarch/qemu-user-static:register
-          platforms: all
-
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v1.3.0
+        run: docker run --rm --privileged multiarch/qemu-user-static:register
 
       - name: Login to DockerHub
         uses: docker/login-action@v1.10.0
@@ -64,62 +57,16 @@ jobs:
           username: ${{ secrets.PACKAGES_USER }}
           password: ${{ secrets.PACKAGES_PASS }}
 
-      - name: Build Docker image (amd64)
-        uses: docker/build-push-action@v2.6.1
-        with:
-          context: ./amd64
-          file: ./amd64/Dockerfile
-          push: true
-          platforms: linux/amd64
-          tags: |
-            buanet/iobroker:dev-amd64,
-            ghcr.io/buanet/iobroker:dev-amd64
-          
-      - name: Build Docker image (armv32v7)
-        uses: docker/build-push-action@v2.6.1
-        with:
-          context: ./arm32v7
-          file: ./arm32v7/Dockerfile
-          push: true
-          platforms: linux/arm/v7
-          tags: |
-            buanet/iobroker:dev-arm32v7,
-            ghcr.io/buanet/iobroker:dev-arm32v7
-      
-      - name: Build Docker image (arm64v8)
-        uses: docker/build-push-action@v2.6.1
-        with:
-          context: ./arm64v8
-          file: ./arm64v8/Dockerfile
-          push: true
-          platforms: linux/arm64
-          tags: |
-            buanet/iobroker:dev-arm64v8,
-            ghcr.io/buanet/iobroker:dev-arm64v8
-          
-      - name: Create and push manifests
+      - name: Build an push Docker image (amd64)
         run: |
-          sed -e "s/\${VERSION}/dev/g" -e "s/\${DOCKERTAG}/dev/g" ./manifest.yml > manifest_dev.yaml
-          ./manifest-tool --username ${{ secrets.DOCKER_USER }} --password ${{ secrets.DOCKER_PASS }} push from-spec manifest_dev.yaml
-          sed -e "s/\${VERSION}/dev/g" -e "s/\${DOCKERTAG}/dev/g" ./manifest_ghcr.yml > manifest_ghcr_dev.yaml
-          ./manifest-tool --username ${{ secrets.PACKAGES_USER }} --password ${{ secrets.PACKAGES_PASS }} push from-spec manifest_ghcr_dev.yaml
+          echo "Building amd64..."
+          sed -i "s/\${VERSION}/devbuild/g" ./amd64/scripts/iobroker_startup.sh
+          docker build -t "buanet/iobroker:dev-amd64" ./amd64
+          docker tag "buanet/iobroker:dev-amd64" "iobroker/iobroker:dev-amd64"
+          echo "Done."
+          echo ''
+          echo "Pushing images to buanet/iobroker..."
+          docker push "buanet/iobroker:dev-amd64"
+          echo "Done."
+          echo ''
           
-      - name: Delete untagged images from GitHub packages
-        uses: actions/github-script@v3
-        with:
-          github-token: ${{ secrets.PACKAGES_PASS }}
-          script: |
-            const response = await github.request("GET /users/${{ env.OWNER }}/packages/container/${{ env.PACKAGE_NAME }}/versions",
-              { per_page: ${{ env.PER_PAGE }}
-            });
-            for(version of response.data) {
-                if (version.metadata.container.tags.length == 0) {
-                    console.log("delete " + version.id)
-                    const deleteResponse = await github.request("DELETE /user/packages/container/${{ env.PACKAGE_NAME }}/versions/" + version.id, { });
-                    console.log("status " + deleteResponse.status)
-                }
-            }
-        env:
-          OWNER: buanet
-          PACKAGE_NAME: iobroker
-          PER_PAGE: 100