diff --git a/.github/workflows/build-astropy.yml b/.github/workflows/build-astropy.yml
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@@ -0,0 +1,115 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the wheel job of
+# https://github.com/astropy/astropy/blob/v8.0.1/.github/workflows/publish.yml,
+# which calls OpenAstronomy/github-actions-workflows' publish.yml.
+name: Build astropy wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'astropy version to build (git tag without leading v, e.g. 8.0.1)'
+        required: true
+        default: '8.0.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-astropy.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '8.0.1' }}-${{ 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 8.0.1 there.
+  ASTROPY_VERSION: ${{ inputs.version || '8.0.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+  # Upstream's wheel job sets this; pyproject.toml's environment-pass forwards it
+  # into the container, where extension-helpers turns it into an abi3 build.
+  EXTENSION_HELPERS_PY_LIMITED_API: 'cp311'
+
+jobs:
+  # Upstream also builds musllinux_x86_64, dropped here: numpy is a build and a
+  # runtime requirement and we publish no musllinux_riscv64 numpy wheel.
+  build_wheels:
+    name: Build astropy ${{ inputs.version || '8.0.1' }} cp311-abi3-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 720
+
+    steps:
+      - name: Checkout astropy v${{ env.ASTROPY_VERSION }}
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
+        with:
+          repository: astropy/astropy
+          ref: v${{ env.ASTROPY_VERSION }}
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # One abi3 wheel, built on cp311 -- the oldest interpreter its tag
+          # claims -- and re-tested on the newer ones via find_compatible_wheel.
+          CIBW_BUILD: >-
+            cp311-manylinux_riscv64 cp312-manylinux_riscv64
+            cp313-manylinux_riscv64 cp314-manylinux_riscv64
+          # pyproject.toml asks for ["auto", "aarch64"], which needs emulation here.
+          CIBW_ARCHS: riscv64
+          # numpy is a build and a runtime requirement, and only our registry has
+          # it for riscv64; only-binary keeps a newer PyPI release from winning the
+          # resolution and then compiling from sdist.
+          CIBW_ENVIRONMENT: >-
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            PIP_ONLY_BINARY=numpy
+            SETUPTOOLS_SCM_PRETEND_VERSION_FOR_ASTROPY=${{ env.ASTROPY_VERSION }}
+          CIBW_TEST_EXTRAS: test
+          CIBW_TEST_COMMAND: >-
+            pytest -Wdefault --astropy-header -m "not hypothesis"
+            -k "not test_data_out_of_range and not test_set_locale and not TestQuantityTyping"
+            --strict-markers --pyargs astropy
+
+      - name: Check wheel contents
+        run: |
+          python3 - wheelhouse/*.whl <<'EOF'
+          import sys, zipfile
+          path = sys.argv[1]
+          assert "-cp311-abi3-" in path, path
+          names = zipfile.ZipFile(path).namelist()
+          exts = [n for n in names if n.endswith(".abi3.so")]
+          assert len(exts) == 18, exts
+          licences = {n.split(".dist-info/licenses/", 1)[1] for n in names
+                      if ".dist-info/licenses/" in n and not n.endswith("/")}
+          assert {"LICENSE.rst", "licenses/ERFA.rst", "licenses/EXPAT_LICENSE.rst",
+                  "licenses/WCSLIB_LICENSE.rst"} <= licences, licences
+          EOF
+
+      - name: Store wheels
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: astropy-${{ env.ASTROPY_VERSION }}-cp311-abi3-manylinux_riscv64
+          path: ./wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish astropy ${{ inputs.version || '8.0.1' }} to GitLab
+    needs: [build_wheels]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Publish wheels and open docs PR
+        uses: riseproject-dev/python-wheels/actions/publish-wheels@main
+        with:
+          artifact-pattern: astropy-${{ env.ASTROPY_VERSION }}-*-manylinux_riscv64
+          gitlab-username: ${{ vars.GITLAB_DEPLOY_USER }}
+          gitlab-token: ${{ secrets.GITLAB_DEPLOY_TOKEN }}
+          gitlab-project-id: ${{ vars.GITLAB_PROJECT_ID }}
+          gh-token: ${{ secrets.GITHUB_TOKEN }}