diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..fd2faa8
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,38 @@
+name: Build
+
+on:
+  push:
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu, windows, macos]
+    runs-on: ${{ matrix.os }}-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build (GCC)
+      if: matrix.os != 'windows'
+      run: ./mk
+    - uses: ilammy/msvc-dev-cmd@v1
+    - name: Build (Windows)
+      if: matrix.os == 'windows'
+      shell: cmd
+      run: mk.bat
+    - uses: actions/upload-artifact@v3
+      with:
+        name: binary-${{ matrix.os }}
+        retention-days: 1
+        path: |
+          fart
+          fart.exe
+    - name: Release
+      uses: softprops/action-gh-release@v1
+      if: startsWith(github.ref, 'refs/tags/')
+      with:
+        files: |
+          fart
+          fart.exe
+        fail_on_unmatched_files: false
+        generate_release_notes: true
+        append_body: true
diff --git a/mk b/mk
index 2f4a2d9..e2946c3 100755
--- a/mk
+++ b/mk
@@ -1,3 +1,3 @@
 #!/usr/bin/env sh
-if [ "$CC" == "" ]; then CC=gcc ; fi
+if [ "$CC" = "" ]; then CC=gcc ; fi
 $CC fart.cpp fart_shared.c wildmat.c -o fart "$@"
diff --git a/mk.bat b/mk.bat
index cdbbd06..6d09a8d 100644
--- a/mk.bat
+++ b/mk.bat
@@ -1,2 +1,3 @@
 REM /O1 /GR- /GX-
-cl fart.cpp fart_shared.c wildmat.c %*
+if "%CC%"=="" set CC=cl
+%CC% fart.cpp fart_shared.c wildmat.c %*