diff --git a/.github/workflows/flutter-macos.yml b/.github/workflows/flutter-macos.yml
index 98b38e01ca..5d5520a974 100644
--- a/.github/workflows/flutter-macos.yml
+++ b/.github/workflows/flutter-macos.yml
@@ -34,6 +34,14 @@ jobs:
         if: matrix.type == 'macos'
         run: flutter config --enable-macos-desktop
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        if: matrix.type == 'macos'
+        with:
+          path: 3rdParty/buildCache
+          key: osx-${{ matrix.type }}-${{ hashFiles('3rdParty/*Mac*.sh', 'mac_build/dependencyNames.sh', 'mac_build/[bB]uild*.sh') }}
+          restore-keys: osx-${{ matrix.type }}-
+
       - name: Build macos client
         if: matrix.type == 'macos'
         run: samples/flutter/ci_build_macos.sh
diff --git a/.github/workflows/flutter-ubuntu.yml b/.github/workflows/flutter-ubuntu.yml
index b9c7678d93..bae8b65482 100644
--- a/.github/workflows/flutter-ubuntu.yml
+++ b/.github/workflows/flutter-ubuntu.yml
@@ -45,10 +45,43 @@ jobs:
           sudo apt update
           sudo apt install -y clang cmake ninja-build pkg-config libgtk-3-dev
 
+      - name: Configure Python
+        run: |
+          pip install boto3
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        if: matrix.type == 'linux'
+        with:
+          path: |
+            3rdParty/buildCache
+            !3rdParty/buildCache/linux/vcpkgcache/
+          key: linux-${{ matrix.type }}-${{ hashFiles('3rdParty/*Linux*.sh', 'linux/*.sh') }}
+          restore-keys: linux-${{ matrix.type }}-
+
+      - name: Download vcpkg binary cache
+        if: matrix.type == 'linux'
+        run: |
+          python ./deploy/manage_vcpkg_archive_cache.py download 3rdParty/buildCache/linux/vcpkgcache/vcpkg/archives/ linux "edu.berkeley.boinc.github.actions.build.vcpkg.binary.cache"
+
       - name: Build linux client
         if: matrix.type == 'linux'
         run: samples/flutter/ci_build_linux.sh
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        if: matrix.type == 'android'
+        with:
+          path: |
+            3rdParty/buildCache
+            !3rdParty/buildCache/android/vcpkgcache/
+          key: android-${{ matrix.type }}-${{ hashFiles('android/*.sh') }}
+
+      - name: Download vcpkg binary cache
+        if: matrix.type == 'android'
+        run: |
+          python ./deploy/manage_vcpkg_archive_cache.py download 3rdParty/buildCache/android/vcpkgcache/vcpkg/archives/ android "edu.berkeley.boinc.github.actions.build.vcpkg.binary.cache"
+
       - name: Build android client
         if: matrix.type == 'android'
         run: samples/flutter/ci_build_android.sh
diff --git a/.github/workflows/flutter-windows.yml b/.github/workflows/flutter-windows.yml
index bb62e507f0..d2c69ab78b 100644
--- a/.github/workflows/flutter-windows.yml
+++ b/.github/workflows/flutter-windows.yml
@@ -36,6 +36,28 @@ jobs:
         if: matrix.type == 'windows'
         run: flutter config --enable-windows-desktop
 
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        if: matrix.type == 'windows'
+        with:
+          path: |
+            ${{ github.workspace }}\3rdParty\Windows\cuda\
+          key: windows-${{ matrix.platform }}-${{ matrix.configuration }}-${{ hashFiles('win_build/vcpkg_3rdparty_dependencies_vs2019.vcxproj') }}
+          restore-keys: windows-${{ matrix.platform }}-${{ matrix.configuration }}-
+
+      - name: Configure Python
+        if: matrix.type == 'windows'
+        shell: cmd
+        run: |
+          pip install boto3
+
+      - name: Download vcpkg binary cache
+        if: matrix.type == 'windows'
+        shell: cmd
+        run: |
+          python deploy\manage_vcpkg_archive_cache.py download ${{ github.workspace }}\3rdParty\buildCache\windows\vcpkgcache\ windows_${{ matrix.platform }} "edu.berkeley.boinc.github.actions.build.vcpkg.binary.cache"
+
+
       - name: Build windows client
         if: matrix.type == 'windows'
         run: samples\flutter\ci_build_windows.bat