diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
new file mode 100644
index 0000000..7540655
--- /dev/null
+++ b/.github/workflows/ci-build.yml
@@ -0,0 +1,97 @@
+# If Github does not properly accept this YAML file, try
+# https://rhysd.github.io/actionlint/ from
+# https://github.com/rhysd/actionlint.
+
+name: 'CI build'
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  LC_ALL: C
+  COMMON_CONFIGURE_FLAGS: >-
+    --disable-silent-rules
+
+jobs:
+  ix-build:
+
+    runs-on: ${{ matrix.os }}
+
+    name: '${{ matrix.os }}'
+
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: 'Determine number of cores to build on (Linux)'
+        if: runner.os == 'Linux'
+        run: echo NPROC=$(nproc) >> $GITHUB_ENV
+
+      - name: 'Determine number of cores to build on (macOS)'
+        if: runner.os == 'macOS'
+        run: echo NPROC=$(sysctl -n hw.logicalcpu) >> $GITHUB_ENV
+
+      # Setting MAKE interferes with Makefile{,.in,.am} using $(MAKE) internally
+      - name: 'Prepare concurrent make'
+        run: if test "x$NPROC" = x; then echo ci_MAKE="make" >> $GITHUB_ENV; echo "NPROC must be set"; exit 1; else echo ci_MAKE="make -j${NPROC} -l${NPROC}" >> $GITHUB_ENV; fi
+
+      - name: 'Update software database (Linux)'
+        if: runner.os == 'Linux'
+        run: sudo apt-get update
+
+      - name: 'Update software database (macOS)'
+        if: runner.os == 'macOS'
+        run: brew update
+
+      - name: 'Install build requirements (Linux)'
+        if: runner.os == 'Linux'
+        run: sudo apt-get install -y automake
+
+      - name: 'Install build requirements (macOS)'
+        if: runner.os == 'macOS'
+        run: brew install automake
+
+      - name: 'OS specific build flags (Linux)'
+        if: runner.os == 'Linux'
+        run: echo OS_SPECIFIC_CPPFLAGS="" >> $GITHUB_ENV
+
+      - name: 'OS specific build flags (macOS)'
+        if: runner.os == 'macOS'
+        run: echo OS_SPECIFIC_CPPFLAGS="" >> $GITHUB_ENV
+
+      - name: 'autoreconf'
+        run: autoreconf -i -f
+
+      - name: 'configure'
+        run: ./configure ${COMMON_CONFIGURE_FLAGS} --prefix=$PWD/__prefix
+
+      - name: 'make'
+        run: set -x; ${ci_MAKE} CPPFLAGS="${OS_SPECIFIC_CPPFLAGS}"
+
+      - name: 'make check'
+        # FIXME: macOS grep has issues with \{,50\}
+        if: runner.os != 'macOS'
+        run: set -x; if ${ci_MAKE} CPPFLAGS="${OS_SPECIFIC_CPPFLAGS}" check; then :; else s="$?"; cat test-suite.log; exit "$s"; fi
+
+      - name: 'make install'
+        run: set -x; ${ci_MAKE} CPPFLAGS="${OS_SPECIFIC_CPPFLAGS}" install
+
+      - name: 'make installcheck'
+        run: set -x; ${ci_MAKE} CPPFLAGS="${OS_SPECIFIC_CPPFLAGS}" installcheck
+
+      - name: 'make distcheck'
+        if: false
+        # if: runner.os != 'macOS'
+        run: set -x; ${ci_MAKE} CPPFLAGS="${OS_SPECIFIC_CPPFLAGS}" DISTCHECK_CONFIGURE_FLAGS="${COMMON_CONFIGURE_FLAGS}" distcheck
+
+      - name: 'dist tarball content'
+        if: false
+        run: for tarball in *.tar.*; do tar tf "$tarball" | sort; break; done
+