How to manually install Piper and whisper on Home Assistant OS?

Navigate in your Home Assistant frontend to Settings → Add-ons → Add-on store.
Find the “Piper” add-on and click it.
Click on the “INSTALL” button.

RUN \
    apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        netcat \
        python3 \
        python3-dev \
        python3-pip \
    \
    && pip3 install --no-cache-dir -U \
        setuptools \
        wheel \
    && pip3 install --no-cache-dir \
        "wyoming-faster-whisper @ https://github.com/rhasspy/wyoming-faster-whisper/archive/refs/tags/v${WYOMING_WHISPER_VERSION}.tar.gz" \
    \
    && apt-get purge -y --auto-remove \
        build-essential \
        python3-dev \
    && rm -rf /var/lib/apt/lists/*

RUN \
    apt-get update \
    && apt-get install -y --no-install-recommends \
        netcat-traditional \
        python3 \
        python3-pip \
    \
    && pip3 install --no-cache-dir -U \
        setuptools \
        wheel \
    && pip3 install --no-cache-dir \
        "wyoming-piper @ https://github.com/rhasspy/wyoming-piper/archive/refs/tags/v${WYOMING_PIPER_VERSION}.tar.gz" \
    \
    && ARCH="${BUILD_ARCH}" \
    && if [[ "${BUILD_ARCH}" = "aarch64" ]]; then ARCH="arm64"; fi \
    && curl -L -s \
        "https://github.com/rhasspy/piper/releases/download/v${BINARY_PIPER_VERSION}/piper_${ARCH}.tar.gz" \
        | tar -zxvf - -C /usr/share \
    \
    && rm -rf /var/lib/apt/lists/*

DEBUG:wyoming_piper.download:Downloading https://huggingface.co/rhasspy/piper-voices/resolve/v1.0.0/zh/zh_CN/huayan/x_low/zh_CN-huayan-x_low.onnx to /data/zh_CN-huayan-x_low.onnx
ERROR:wyoming_piper.download:Unexpected error while downloading files for zh_CN-huayan-x_low

wyoming_piper.download.VoiceNotFoundError: zh_CN-huayan-x_low
[08:02:16] INFO: Service exited with code 1 (by signal 0)

s6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service whisper: starting
s6-rc: info: service whisper successfully started
s6-rc: info: service discovery: starting