diff --git a/.github/workflows/extra-builds.yml b/.github/workflows/extra-builds.yml
index 603d91e5d..788e12c29 100644
--- a/.github/workflows/extra-builds.yml
+++ b/.github/workflows/extra-builds.yml
@@ -45,6 +45,11 @@ jobs:
       - name: Setup MSVC
         uses: ilammy/msvc-dev-cmd@v1
 
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: vs-build
+
       - name: Install flex/bison
         shell: pwsh
         run: |
@@ -57,8 +62,9 @@ jobs:
       - name: Configure CMake
         run: >
           cmake -S . -B build
-          -A x64
+          -G Ninja
           -DCMAKE_BUILD_TYPE=Release
+          -DYOSYS_COMPILER_LAUNCHER=ccache
 
       - name: Build
         run: >
@@ -85,6 +91,11 @@ jobs:
 
           install: >-
             base-devel
+            bison
+            flex
+            gawk
+            diffutils
+            make
             mingw-w64-x86_64-toolchain
             mingw-w64-x86_64-cmake
             mingw-w64-x86_64-gtest
@@ -93,13 +104,12 @@ jobs:
             mingw-w64-x86_64-tcl
             mingw-w64-x86_64-libffi
             mingw-w64-x86_64-git
+            mingw-w64-x86_64-ccache
 
-          msys2-install: >-
-            bison
-            flex
-            gawk
-            diffutils
-            make
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: mingw-build
 
       - name: Build Yosys
         shell: msys2 {0}
@@ -107,7 +117,7 @@ jobs:
           set -e
           procs=$(nproc)
           rm -rf build
-          cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
+          cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DYOSYS_COMPILER_LAUNCHER=ccache
           cmake --build build -j${procs}
           ctest --test-dir build/tests/unit --output-on-failure
 
@@ -121,6 +131,11 @@ jobs:
         with:
           submodules: true
           persist-credentials: false
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: wasi-build
+
       - name: Build
         run: |
           WASI_VER=33
@@ -140,7 +155,7 @@ jobs:
             make install)
 
           export PATH=${WASI_SDK_PATH}/bin:$(pwd)/flex-prefix/bin:${PATH}
-          cmake -B build -DCMAKE_TOOLCHAIN_FILE=${WASI_SDK_PATH}/share/cmake/wasi-sdk-p1.cmake -DCMAKE_BUILD_TYPE=Release .
+          cmake -B build -DCMAKE_TOOLCHAIN_FILE=${WASI_SDK_PATH}/share/cmake/wasi-sdk-p1.cmake -DCMAKE_BUILD_TYPE=Release -DYOSYS_COMPILER_LAUNCHER=ccache .
           cmake --build build -j$(nproc)
 
   nix-build:
diff --git a/.github/workflows/test-build.yml b/.github/workflows/test-build.yml
index e09fd9eb3..6edf4fb25 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/test-build.yml
@@ -79,11 +79,16 @@ jobs:
           runs-on: ${{ matrix.os }}
           get-build-deps: true
 
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: test-build-${{ matrix.os }}
+
       - name: Build
         shell: bash
         run: |
           rm -rf build
-          cmake -B build . -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Release
+          cmake -B build . -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Release -DYOSYS_COMPILER_LAUNCHER=ccache
           cmake --build build -j$procs
           ctest --test-dir build/tests/unit
 
diff --git a/.github/workflows/test-compile.yml b/.github/workflows/test-compile.yml
index 3093e8dfd..87798c3a1 100644
--- a/.github/workflows/test-compile.yml
+++ b/.github/workflows/test-compile.yml
@@ -69,6 +69,11 @@ jobs:
           runs-on: ${{ matrix.os }}
           get-build-deps: true
 
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: test-compile-${{ matrix.os }}-${{ matrix.compiler }}
+
       - name: Setup Cpp
         uses: aminya/setup-cpp@v1
         with:
@@ -91,7 +96,7 @@ jobs:
         shell: bash
         run: |
           rm -rf build
-          cmake -B build -DCMAKE_CXX_STANDARD=20 . --fresh
+          cmake -B build -DCMAKE_CXX_STANDARD=20 -DYOSYS_COMPILER_LAUNCHER=ccache . --fresh
           cmake --build build --target yosys -j$procs
 
       # maximum standard, only on newest compilers
@@ -100,7 +105,7 @@ jobs:
         shell: bash
         run: |
           rm -rf build
-          cmake -B build -DCMAKE_CXX_STANDARD=26 . --fresh
+          cmake -B build -DCMAKE_CXX_STANDARD=26 -DYOSYS_COMPILER_LAUNCHER=ccache . --fresh
           cmake --build build --target yosys -j$procs
 
   test-compile-result:
diff --git a/.github/workflows/test-sanitizers.yml b/.github/workflows/test-sanitizers.yml
index d6c77fcf1..94ef62f04 100644
--- a/.github/workflows/test-sanitizers.yml
+++ b/.github/workflows/test-sanitizers.yml
@@ -60,13 +60,19 @@ jobs:
           get-test-deps: true
           get-iverilog: true
 
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2.23
+        with:
+          key: test-san-${{ matrix.os }}
+
       - name: Build
         shell: bash
         run: |
           rm -rf build
           cmake -B build . \
                 -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ \
-                -DCMAKE_BUILD_TYPE=Sanitize -DSANITIZE=${{ matrix.sanitizer }}
+                -DCMAKE_BUILD_TYPE=Sanitize -DSANITIZE=${{ matrix.sanitizer }} \
+                -DYOSYS_COMPILER_LAUNCHER=ccache
           cmake --build build -j$procs
 
       - name: Log yosys-config output