diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index da534b1..1ad11fe 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,43 +6,48 @@ on:
 
 jobs:
   build:
-    name: build - ${{ matrix.runs-on }}
+    name: build - ${{ matrix.platform }}
     runs-on: ${{ matrix.runs-on }}
     permissions:
       contents: write
     strategy:
       fail-fast: false
       matrix:
-        runs-on: [ubuntu-latest, ubuntu-24.04-arm, macos-latest]
+        include:
+          - platform: linux-x86_64
+            runs-on: ubuntu-latest
+          - platform: linux-arm64
+            runs-on: ubuntu-24.04-arm
+          - platform: macos
+            runs-on: macos-latest
     steps:
       - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
+        if: runner.os != 'Linux'
         with:
           python-version: "3.14"
 
-      - name: Install build dependencies
-        run: ./setup.sh
+      - name: Build wheels
+        run: ./build_wheels.sh dist/
 
-      - name: build and release wheels
+      - name: Upload releases
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          pip install build
-
           for toml in */pyproject.toml; do
             [ -f "$toml" ] || continue
             pkg="$(dirname "$toml")"
+            module="${pkg//-/_}"
             version=$(python3 -c "import tomllib; print(tomllib.load(open('$toml', 'rb'))['project']['version'])")
             tag="${pkg}/v${version}"
 
             echo "========================================="
-            echo "Building: $pkg v$version"
+            echo "Uploading: $pkg v$version"
             echo "========================================="
-            python -m build --wheel "$pkg"
 
-            whl=$(ls "$pkg"/dist/*.whl)
-            echo "Uploading: $whl"
+            whl=$(ls dist/${module}-${version}-*.whl 2>/dev/null) || continue
+            echo "Wheel: $whl"
             if gh release view "$tag" --repo "$GITHUB_REPOSITORY" &>/dev/null; then
               gh release upload "$tag" "$whl" --repo "$GITHUB_REPOSITORY" --clobber
             else
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 402d7b9..e997200 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,16 +22,12 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
+        if: runner.os != 'Linux'
         with:
           python-version: "3.14"
-      - name: Install build dependencies
-        run: ./setup.sh
       - name: Build wheels
-        run: |
-          for pkg in */pyproject.toml; do
-            pip wheel "./$(dirname "$pkg")" --no-deps --wheel-dir dist/
-          done
-      - name: Smoketest locally
+        run: ./build_wheels.sh dist/
+      - name: Smoketest
         run: bash smoketest.sh dist/
       - uses: actions/upload-artifact@v4
         with:
@@ -51,6 +47,8 @@ jobs:
             runs-on: ubuntu-latest
           - image: ubuntu:24.04
             runs-on: ubuntu-latest
+          - image: ubuntu:20.04
+            runs-on: ubuntu-latest
           - image: fedora:41
             runs-on: ubuntu-latest
           - image: archlinux:latest
diff --git a/build_wheels.sh b/build_wheels.sh
new file mode 100755
index 0000000..4950475
--- /dev/null
+++ b/build_wheels.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$DIR"
+
+WHEEL_DIR="${1:-dist}"
+
+# on Linux, build inside manylinux_2_28 container for glibc 2.28 compatibility.
+# for reference, Ubuntu 20.04 is glibc 2.31, so this gives us wide compatibility.
+if [ "$(uname)" = "Linux" ] && [ -z "${MANYLINUX:-}" ]; then
+  ARCH="$(uname -m)"
+  IMAGE="quay.io/pypa/manylinux_2_28_${ARCH}"
+  exec docker run --rm \
+    -e MANYLINUX=1 \
+    -v "$DIR:/work" \
+    -w /work \
+    "$IMAGE" \
+    bash build_wheels.sh "$WHEEL_DIR"
+fi
+
+# Set up Python inside manylinux container
+if [ -n "${MANYLINUX:-}" ]; then
+  export PATH="/opt/python/cp312-cp312/bin:$PATH"
+fi
+
+./setup.sh
+pip install setuptools wheel
+
+mkdir -p "$WHEEL_DIR"
+for pkg in */pyproject.toml; do
+  pip wheel "./$(dirname "$pkg")" --no-deps --wheel-dir "$WHEEL_DIR"/
+done
diff --git a/setup.sh b/setup.sh
index 999cc07..0cc73ef 100755
--- a/setup.sh
+++ b/setup.sh
@@ -3,6 +3,8 @@ set -euo pipefail
 
 if [ "$(uname)" = "Darwin" ]; then
   brew install nasm pkg-config
-else
+elif command -v dnf &>/dev/null; then
+  dnf install -y nasm cmake gcc-c++ pkgconfig git perl-IPC-Cmd
+elif command -v apt-get &>/dev/null; then
   sudo apt-get update && sudo apt-get install -y nasm cmake g++ pkg-config
 fi