diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 503483546..35c3714d7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -87,7 +87,23 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update -qy
-          sudo apt-get install -qy libsdl2-dev # The compilers are already installed on GitHub's runners.
+          sudo apt-get install -qy libsdl2-dev ccache # The compilers are already installed on GitHub's runners.
+
+      - name: Setup CCache
+        run: |
+          eval $(printf 'PATH=/usr/lib/ccache:%s\n' "$PATH" | tee -a "$GITHUB_ENV")
+          cat <<EOF >>"$GITHUB_ENV"
+          CCACHE_MAXSIZE=500M
+          CCACHE_DIR=$HOME/.cache/ccache
+          CCACHE_BASEDIR=$PWD
+          EOF
+      - name: Cache compilation
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ matrix.compiler }}-${{ matrix.os }}
+          restore-keys: |
+            ccache-${{ matrix.compiler }}
 
       # stderr is not detected as a TTY, so diagnostics are by default printed without colours;
       # forcing colours makes the log a little nicer to read.
@@ -118,7 +134,23 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update -qy
-          sudo apt-get install -qy libsdl2-dev libfuse2 # The compilers are already installed on GitHub's runners.
+          sudo apt-get install -qy libsdl2-dev libfuse2 ccache # The compilers are already installed on GitHub's runners.
+
+      - name: Setup CCache
+        run: |
+          eval $(printf 'PATH=/usr/lib/ccache:%s\n' "$PATH" | tee -a "$GITHUB_ENV")
+          cat <<EOF >>"$GITHUB_ENV"
+          CCACHE_MAXSIZE=500M
+          CCACHE_DIR=$HOME/.cache/ccache
+          CCACHE_BASEDIR=$PWD
+          EOF
+      - name: Cache compilation
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-clang-ubuntu-20.04
+          restore-keys: |
+            ccache-clang
 
       - name: Build Mesen (AppImage)
         run: |
@@ -154,7 +186,23 @@ jobs:
 
       - name: Install dependencies
         run: |
-          brew install sdl2
+          brew install sdl2 ccache
+
+      - name: Setup CCache
+        run: |
+          eval $(printf 'PATH=$(brew --prefix)/opt/ccache/libexec:%s\n' "$PATH" | tee -a "$GITHUB_ENV")
+          cat <<EOF >>"$GITHUB_ENV"
+          CCACHE_MAXSIZE=500M
+          CCACHE_DIR=$HOME/.cache/ccache
+          CCACHE_BASEDIR=$PWD
+          EOF
+      - name: Cache compilation
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ matrix.compiler }}-${{ matrix.platform.os }}
+          restore-keys: |
+            ccache-${{ matrix.compiler }}
 
       # stderr is not detected as a TTY, so diagnostics are by default printed without colours;
       # forcing colours makes the log a little nicer to read.