diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2fe802cb..233987b7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,6 +14,7 @@ jobs:
 
 ## We delete the Bundle's version of Kaleidoscope, and symlink ourselves in.
 ## This makes sure we're using the current version of the library.
+    - run: sudo apt-get install ccache
     - run: git clone --depth 1 --recurse-submodules=build-tools --recurse-submodules=toolchain --recurse-submodules=avr/libraries/ --jobs 16 --shallow-submodules git://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio $ARDUINO_DIRECTORIES_USER/hardware/keyboardio
     # - run: make adjust-git-timestamps
     - run: make install-arduino-cli
@@ -25,6 +26,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 #    - uses: mxschmitt/action-tmate@v3
+    - run: sudo apt-get install ccache
     - run: git clone --depth 1 --recurse-submodules=build-tools --recurse-submodules=toolchain --recurse-submodules=avr/libraries/ --jobs 16 --shallow-submodules git://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio $ARDUINO_DIRECTORIES_USER/hardware/keyboardio
     # - run: make adjust-git-timestamps
     - run: make install-arduino-cli