diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..9ac0eb5
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,85 @@
+name: CI
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+
+env:
+  NIM_VERSION: '2.2.4'
+  NIMBLE_VERSION: '0.22.3'
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-22.04, macos-15, windows-latest]
+        nim-version: ['2.2.4', 'stable']
+
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.os }} / Nim ${{ matrix.nim-version }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Nim
+        uses: jiro4989/setup-nim-action@v2
+        with:
+          nim-version: ${{ matrix.nim-version }}
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install Nimble ${{ env.NIMBLE_VERSION }}
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" == "Windows" ]; then
+            export PATH="$GITHUB_WORKSPACE/.nim_runtime/bin:$PATH"
+          fi
+          cd /tmp && nimble install "nimble@${{ env.NIMBLE_VERSION }}" -y
+          echo "$HOME/.nimble/bin" >> $GITHUB_PATH
+
+      - name: Cache nimble deps
+        id: cache-nimbledeps
+        uses: actions/cache@v4
+        with:
+          path: |
+            nimbledeps/
+            nimble.paths
+          key: ${{ runner.os }}-nimbledeps-${{ matrix.nim-version }}-${{ hashFiles('*.nimble') }}
+          restore-keys: |
+            ${{ runner.os }}-nimbledeps-${{ matrix.nim-version }}-
+            ${{ runner.os }}-nimbledeps-
+
+      - name: Install nimble deps
+        if: steps.cache-nimbledeps.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" == "Windows" ]; then
+            export PATH="$GITHUB_WORKSPACE/.nim_runtime/bin:$HOME/.nimble/bin:$PATH"
+          fi
+          nimble setup --localdeps -y
+
+      - name: Build
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" == "Windows" ]; then
+            export PATH="$GITHUB_WORKSPACE/.nim_runtime/bin:$HOME/.nimble/bin:$PATH"
+          fi
+          nimble buildffi -y
+
+      - name: Run allocation tests
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" == "Windows" ]; then
+            export PATH="$GITHUB_WORKSPACE/.nim_runtime/bin:$HOME/.nimble/bin:$PATH"
+          fi
+          nimble test_alloc -y
+
+      - name: Run FFI context tests
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" == "Windows" ]; then
+            export PATH="$GITHUB_WORKSPACE/.nim_runtime/bin:$HOME/.nimble/bin:$PATH"
+          fi
+          nimble test_ffi -y
diff --git a/ffi.nimble b/ffi.nimble
index 9639a5c..3086130 100644
--- a/ffi.nimble
+++ b/ffi.nimble
@@ -14,8 +14,8 @@ requires "taskpools"
 
 const nimFlags = "--mm:orc -d:chronicles_log_level=WARN"
 
-task build, "Compile the library":
-  exec "nim c " & nimFlags & " --noMain ffi.nim"
+task buildffi, "Compile the library":
+  exec "nim c " & nimFlags & " --app:lib --noMain ffi.nim"
 
 task test, "Run all tests":
   exec "nim c -r " & nimFlags & " tests/test_alloc.nim"