diff --git a/.gitea/limbo_actions/buildkit-build-push/action.yaml b/.gitea/limbo_actions/buildkit-build-push/action.yaml
index 687e2db..171a69c 100644
--- a/.gitea/limbo_actions/buildkit-build-push/action.yaml
+++ b/.gitea/limbo_actions/buildkit-build-push/action.yaml
@@ -38,26 +38,10 @@ runs:
     - name: run buildctl build and push
       shell: bash
       run: |
-       # create docker config temp folder
-        DOCKER_CONFIG_DIR="${RUNNER_TEMP}/.buildctl_docker"
-        mkdir -p "$DOCKER_CONFIG_DIR"
-
-        # clean up
-        trap 'rm -rf "$DOCKER_CONFIG_DIR"' EXIT
-
-
-        # setup file docker config (auth) temp file
-        AUTH=$(printf "%s" "${{ inputs.registry_username }}:${{ inputs.registry_password }}" | base64 -w 0)
-        cat > "$DOCKER_CONFIG_DIR/config.json" <<EOF
-        {
-          "auths": {
-            "${{ inputs.registry_addr }}": {
-              "auth": "$AUTH"
-            }
-          }
-        }
-        EOF
 
+        AUTH=$(printf '{"username":"%s","password":"%s"}' \
+          "${{ inputs.registry_username }}" \
+          "${{ inputs.registry_password }}" | base64 -w0)
 
         # Build build-arg flags
         BUILD_ARG_FLAGS=""
@@ -68,8 +52,7 @@ runs:
 
         echo "Using build args: $BUILD_ARG_FLAGS"
 
-        # Run BuildKit build
-        DOCKER_CONFIG=$DOCKER_CONFIG_DIR buildctl \
+        buildctl \
           --addr ${{ inputs.buildkit_addr }} \
           build \
           --frontend=dockerfile.v0 \
@@ -77,4 +60,4 @@ runs:
           --local dockerfile=${{ inputs.dockerfile }} \
           --opt filename=${{ inputs.filename }} \
           $BUILD_ARG_FLAGS \
-          --output type=image,name=${{ inputs.tags }},push=true
+          --output type=image,name=${{ inputs.tags }},push=true,registry.auth=$AUTH
\ No newline at end of file