diff --git a/.github/workflows/build-pyqwest.yml b/.github/workflows/build-pyqwest.yml
new file mode 100644
index 000000000..70779b8a8
--- /dev/null
+++ b/.github/workflows/build-pyqwest.yml
@@ -0,0 +1,138 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `linux` job of
+# https://github.com/curioswitch/pyqwest/blob/v0.10.0/.github/workflows/release.yaml
+name: Build pyqwest wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'pyqwest version to build (git tag without the leading v, e.g. 0.10.0)'
+        required: true
+        default: '0.10.0'
+  pull_request:
+    paths:
+      - '.github/workflows/build-pyqwest.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.10.0' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  # `inputs.version` is empty on pull_request events; default to 0.10.0 there.
+  PYQWEST_VERSION: ${{ inputs.version || '0.10.0' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build pyqwest ${{ inputs.version || '0.10.0' }} ${{ matrix.tag }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 360
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # pyo3/abi3-py310 is an opt-in feature upstream's own release job adds
+          # only on top of a `pyo3/extension-module`-only build (its second
+          # "Build abi3 wheels" step, `-i 3.10 --features pyo3/abi3-py310`);
+          # nothing in Cargo.toml turns it on by default. Built on cp310 --
+          # the oldest interpreter the abi3 tag claims -- and re-tested on the
+          # newer ones via find_compatible_wheel. pyo3 disables abi3 under
+          # Py_GIL_DISABLED, so the free-threaded build is its own wheel.
+          - tag: cp310-abi3
+            build: >-
+              cp310-manylinux_riscv64 cp311-manylinux_riscv64
+              cp312-manylinux_riscv64 cp313-manylinux_riscv64
+              cp314-manylinux_riscv64
+            features: --features pyo3/extension-module --features pyo3/abi3-py310
+          - tag: cp314t
+            build: cp314t-manylinux_riscv64
+            features: --features pyo3/extension-module
+
+    steps:
+      - name: Checkout pyqwest v${{ env.PYQWEST_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: curioswitch/pyqwest
+          ref: v${{ env.PYQWEST_VERSION }}
+          persist-credentials: false
+
+      - name: Replace tests/conftest.py to drop the pyvoy-based local server
+        # The real conftest.py imports pyvoy unconditionally to run a local
+        # Envoy-based test server; pyvoy bundles Envoy and ships no riscv64
+        # wheel anywhere. This keeps only the client_type fixture (copied
+        # verbatim) needed by the self-contained subset of tests below --
+        # none of them open a socket or need a live server.
+        run: |
+          cat > tests/conftest.py <<'EOF'
+          from __future__ import annotations
+
+          import pytest
+
+
+          @pytest.fixture(params=["async", "sync", "async_asgi", "sync_wsgi"])
+          def client_type(request: pytest.FixtureRequest) -> str:
+              return request.param
+          EOF
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+        env:
+          # musllinux is dropped: rustup.rs ships no riscv64 musl toolchain.
+          CIBW_BUILD: ${{ matrix.build }}
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # pyqwest ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here. aws-lc-sys
+          # (pulled in by reqwest's rustls/http3 stack) ships prebuilt
+          # riscv64gc bindings, and cmake is already in the manylinux image.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: >-
+            PATH="$PATH:$HOME/.cargo/bin"
+            MATURIN_PEP517_ARGS="${{ matrix.features }}"
+          CIBW_TEST_REQUIRES: pytest pytest-asyncio pytest-benchmark
+          CIBW_TEST_SOURCES: >-
+            tests/__init__.py tests/_util.py tests/conftest.py
+            tests/test_common.py tests/test_multipart_encode.py
+            tests/test_protocol_errors.py tests/test_request.py
+            tests/test_response.py tests/test_timeout.py
+            tests/test_validation.py pyproject.toml
+          # The other test files need the pyvoy local server dropped above;
+          # this subset is the pyvoy-independent slice of upstream's own
+          # suite -- request/response/multipart construction, protocol-error
+          # framing over a raw socket (tests/_util.py's raw_server), TLS
+          # option validation and the sync timeout context manager.
+          CIBW_TEST_COMMAND: >-
+            python -c "import pyqwest._pyqwest as m; assert m.__file__.endswith('.so'), m.__file__"
+            && python -m pytest -v
+            tests/test_common.py tests/test_multipart_encode.py
+            tests/test_protocol_errors.py tests/test_request.py
+            tests/test_response.py tests/test_timeout.py
+            tests/test_validation.py
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: pyqwest-${{ env.PYQWEST_VERSION }}-${{ matrix.tag }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish pyqwest ${{ inputs.version || '0.10.0' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: pyqwest-${{ inputs.version || '0.10.0' }}-*-manylinux_riscv64