diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 79dd931..12810e3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -38,6 +38,14 @@ jobs:
             cmake-args: -DCMAKE_TOOLCHAIN_FILE=$GITHUB_WORKSPACE/32blit-sdk/32blit.toolchain
             apt-packages: gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib python3-setuptools
 
+          - os: ubuntu-20.04
+            pico-sdk: true
+            name: PicoSystem
+            cache-key: picosystem
+            release-suffix: PicoSystem
+            cmake-args: -DCMAKE_TOOLCHAIN_FILE=$GITHUB_WORKSPACE/32blit-sdk/pico.toolchain -DPICO_BOARD=pimoroni_picosystem
+            apt-packages: gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib python3-setuptools
+
           - os: ubuntu-20.04
             name: Emscripten
             release-suffix: WEB
@@ -75,6 +83,15 @@ jobs:
         repository: 32blit/32blit-sdk
         path: 32blit-sdk
 
+    # pico sdk for some builds
+    - name: Checkout Pico SDK
+      if: matrix.pico-sdk
+      uses: actions/checkout@v2
+      with:
+        repository: raspberrypi/pico-sdk
+        path: pico-sdk
+        submodules: true
+
     # Linux dependencies
     - name: Install Linux deps
       if: runner.os == 'Linux'