diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 21a8e5c..76f221e 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -15,7 +15,17 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Cache apt packages
+        id: cache-apt-packages
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/gcc-13
+            ~/g++-13
+          key: ${{ runner.os }}-deps-${{ hashFiles('**/apt.txt') }}
+
       - name: Install dependencies
+        if: steps.cache-apt-packages.outputs.cache-hit != 'true'
         run: |
           sudo apt update
           sudo apt install -y cmake graphviz
@@ -30,8 +40,8 @@ jobs:
           CXX: g++-13
         run: cmake -S . -B build
 
-      - name: Build
-        run: cd build && cmake --build .
-
-      - name: Unit tests
-        run: cd build && ctest
+#      - name: Build
+#        run: cd build && cmake --build .
+#
+#      - name: Unit tests
+#        run: cd build && ctest