diff --git a/README.md b/README.md
index a741d12..9da972f 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,10 @@ Building the project with default configuration will result in script name `__ma
 
 ### ARM Architecture Build
 
+
+The ARMv7 build image already includes most of the required system packages by default. However, if you need to add extra system packages, you can do so as shown in the example below.
+For more details about the ARMv7 image, refer to its [Dockerfile definition](https://github.com/espressif/github-esp-dockerfiles/blob/master/idf_python_wheels_legacy/Dockerfile).
+
 ```yaml
 - name: Build for ARMv7
   uses: espressif/python-binary-action@master
@@ -146,7 +150,7 @@ Building the project with default configuration will result in script name `__ma
     scripts: 'main.py'
     output-dir: './arm-binaries'
     target-platform: 'linux-armv7'
-    additional-arm-packages: 'openssl libffi-dev libffi7 libssl-dev'
+    additional-arm-packages: 'openssl libffi-dev'
     python-version: '3.11'
 ```
 
@@ -278,7 +282,7 @@ jobs:
 | `additional-args`         | Additional PyInstaller arguments          | `""`                                        | `"--hidden-import=module"`                   |
 | `pip-extra-index-url`     | Extra Python package index URL            | `https://dl.espressif.com/pypi`             | `""`                                         |
 | `install-deps-command`    | Command to install project dependencies   | `"uv pip install -e ."`                     | `"uv pip install -r requirements.txt"`       |
-| `additional-arm-packages` | ARMv7 ONLY: Additional system packages    | `""`                                        | `"openssl libffi-dev"`                       |
+| `additional-arm-packages` | ARMv7 ONLY: Extra apt packages (the Espressif ARMv7 image already ships most build deps) | `""`          | `"openssl libssl-dev"`                       |
 | `test-command-args`       | Command arguments to test executables     | `"--help"`                                  | `"--version"`                                |
 
 > [!IMPORTANT]
diff --git a/action.yml b/action.yml
index dfa4f3f..902a629 100644
--- a/action.yml
+++ b/action.yml
@@ -52,8 +52,9 @@ inputs:
     required: false
     default: uv pip install -e .
   additional-arm-packages:
-    description: 'ARMv7 ONLY: Additional system packages to install (space-separated).
-      e.g. for cryptography: openssl libffi-dev libffi7 libssl-dev'
+    description: 'ARMv7 ONLY: Optional extra apt packages (space-separated). The Espressif
+      idf-python-wheels-armv7l image already includes build tools, libffi-dev, libssl-dev,
+      patchelf, etc.; omit this unless you need more.'
     required: false
     default: ''
   test-command-args:
@@ -132,68 +133,50 @@ runs:
         # Write include-data-dirs to a temporary file to avoid shell escaping issues
         echo '${{ inputs.include-data-dirs }}' > ${GITHUB_ACTION_PATH}/include_data_dirs.json
 
+    - name: Set up QEMU for ARMv7 Docker
+      if: inputs.target-platform == 'linux-armv7'
+      uses: docker/setup-qemu-action@v3
+
     - name: Build for ARMv7 architecture
       if: inputs.target-platform == 'linux-armv7'
-      uses: uraimo/run-on-arch-action@v3
-      with:
-        arch: armv7
-        # Use Ubuntu 20.04 because of missing libffi7 in 24.04 (cryptography requires it) and better compatibility with GLIBC
-        distro: ubuntu20.04
-        shell: /bin/bash
-        githubToken: ${{ github.token }}
-        setup: mkdir -p "${PWD}/${{ inputs.output-dir }}"
-        dockerRunArgs: |
-          --volume "${PWD}/${{ inputs.output-dir }}:/${{ inputs.output-dir }}"
-          --volume "${GITHUB_ACTION_PATH}:/github/action"
-        install: |
-          export DEBIAN_FRONTEND=noninteractive
-          export TZ=UTC
-          apt-get update -y
-          apt-get install -y curl git build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev pkg-config gcc g++ patchelf binutils ${{ inputs.additional-arm-packages }}
-        run: |
-          adduser --disabled-password --gecos "" builder
-          chmod -R a+rwx /home/runner/work
-          su builder <<'EOF'
-          curl -LsSf https://astral.sh/uv/install.sh | sh
-          source $HOME/.local/bin/env
-          # Install Python version using uv
-          uv python install ${{ inputs.python-version }}
-          # Create and activate virtual environment
-          uv venv
-          source .venv/bin/activate
-          # Install UV and upgrade tools
-          uv pip install --upgrade setuptools wheel
-          export PATH=$PATH:/home/builder/.local/bin
+      shell: bash
+      run: |
+        docker run --rm \
+          --platform linux/arm/v7 \
+          -v "${PWD}/${{ inputs.output-dir }}:/${{ inputs.output-dir }}" \
+          -v "${GITHUB_ACTION_PATH}:/github/action" \
+          -v "${GITHUB_WORKSPACE}:/${GITHUB_WORKSPACE}" \
+          -w ${GITHUB_WORKSPACE} \
+          ghcr.io/espressif/github-esp-dockerfiles/idf-python-wheels-armv7l:v1 \
+          bash -c "
+          export DEBIAN_FRONTEND=noninteractive &&
+          export TZ=UTC &&
+          if [ -n '${{ inputs.additional-arm-packages }}' ]; then
+            apt-get update -y &&
+            apt-get install -y ${{ inputs.additional-arm-packages }}
+          fi &&
+          curl -LsSf https://astral.sh/uv/install.sh | sh &&
+          source /root/.local/bin/env &&
+          uv python install ${{ inputs.python-version }} &&
+          uv venv &&
+          source .venv/bin/activate &&
+          uv pip install --upgrade setuptools wheel &&
 
-          # Setup environment using helper script
+          export GITHUB_ACTION_PATH=/github/action &&
           /github/action/setup_environment.sh \
-            "${{ inputs.pyinstaller-version }}" \
-            "${{ inputs.pip-extra-index-url }}" \
-            "${{ inputs.install-deps-command }}"
-
-          # Write include-data-dirs to a temporary file to avoid shell escaping issues
-          echo '${{ inputs.include-data-dirs }}' > /tmp/include_data_dirs.json
+            '${{ inputs.pyinstaller-version }}' \
+            '${{ inputs.pip-extra-index-url }}' \
+            '${{ inputs.install-deps-command }}' &&
 
-          # Build each file using the script
-          export GITHUB_ACTION_PATH=/github/action
-          /github/action/build_with_pyinstaller.sh \
-            "${{ inputs.target-platform }}" \
-            "${{ inputs.output-dir }}" \
-            "${{ inputs.scripts }}" \
-            "${{ inputs.script-name }}" \
-            "" \
-            "/tmp/include_data_dirs.json" \
-            "${{ steps.setup-platform.outputs.data-separator }}" \
-            "${{ inputs.additional-args }}"
+          /github/action/build_with_pyinstaller.sh '${{ inputs.target-platform }}' '${{ inputs.output-dir }}' '${{ inputs.scripts }}' '${{ inputs.script-name }}' '${{ inputs.icon-file }}' '/github/action/include_data_dirs.json' '${{ steps.setup-platform.outputs.data-separator }}' '${{ inputs.additional-args }}' &&
 
-          # Test binaries using helper script
           /github/action/test_executables.sh \
-            "${{ inputs.scripts }}" \
-            "${{ inputs.script-name }}" \
-            "${{ inputs.output-dir }}" \
-            "${{ steps.setup-platform.outputs.exe-extension }}" \
-            "${{ inputs.test-command-args }}"
-          EOF
+            '${{ inputs.scripts }}' \
+            '${{ inputs.script-name }}' \
+            '${{ inputs.output-dir }}' \
+            '${{ steps.setup-platform.outputs.exe-extension }}' \
+            '${{ inputs.test-command-args }}'
+          "
 
     - name: Build for Linux (Docker)
       # Running in Docker to link older versions of GLIBC, because the GitHub runners don't offer ubuntu 20.04 anymore