diff --git a/.github/workflows/build-lzfse.yml b/.github/workflows/build-lzfse.yml
new file mode 100644
index 000000000..b54aeea8e
--- /dev/null
+++ b/.github/workflows/build-lzfse.yml
@@ -0,0 +1,85 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/m1stadev/lzfse/blob/v0.4.2/.github/workflows/pypi-build-publish.yml
+name: Build lzfse wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'lzfse version to build (git tag, e.g. v0.4.2)'
+        required: true
+        default: 'v0.4.2'
+  pull_request:
+    paths:
+      - '.github/workflows/build-lzfse.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || 'v0.4.2' }}-${{ 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 v0.4.2 there.
+  LZFSE_VERSION: ${{ inputs.version || 'v0.4.2' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build lzfse ${{ inputs.version || 'v0.4.2' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+          - "cp314t"
+
+    steps:
+      - name: Checkout lzfse ${{ env.LZFSE_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: m1stadev/lzfse
+          ref: ${{ env.LZFSE_VERSION }}
+          # The Apple LZFSE reference implementation is a submodule, compiled into the extension.
+          submodules: recursive
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          CIBW_TEST_COMMAND: >-
+            python -c "import importlib.metadata as m; f = {p.name for p in m.files('lzfse') if '.dist-info/licenses/' in str(p)}; assert f == {'AUTHORS', 'COPYING', 'LICENSE.lzfse'}, f;
+            import lzfse; assert lzfse.__file__.endswith('.so'), lzfse.__file__;
+            data = b'hello world' * 1000;
+            assert lzfse.decompress(lzfse.compress(data)) == data"
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: lzfse-${{ env.LZFSE_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish lzfse ${{ inputs.version || 'v0.4.2' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: lzfse-${{ inputs.version || 'v0.4.2' }}-*-manylinux_riscv64