diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ad7527633..8de237cc5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -40,7 +40,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: /Users/runner/Library/Caches/ccache
           key: ccache-${{ runner.os }}-build-${{ github.sha }}
@@ -57,6 +59,12 @@ jobs:
         run: |
           ${{env.CCACHE_SETTINGS}}
           ${{env.BUILD_DEFAULT}}
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: /Users/runner/Library/Caches/ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   build-windows:
     name: 'Windows (MSYS2)'
@@ -68,7 +76,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: C:\Users\runneradmin\AppData\Local\ccache
           key: ccache-${{ runner.os }}-build-${{ github.sha }}
@@ -76,6 +86,7 @@ jobs:
       - uses: msys2/setup-msys2@v2
         with:
           update: true
+          cache: false
           install: mingw-w64-x86_64-toolchain make mingw-w64-x86_64-cmake mingw-w64-x86_64-ccache mingw-w64-x86_64-boost mingw-w64-x86_64-openssl mingw-w64-x86_64-zeromq mingw-w64-x86_64-libsodium mingw-w64-x86_64-hidapi mingw-w64-x86_64-protobuf mingw-w64-x86_64-libusb mingw-w64-x86_64-unbound mingw-w64-x86_64-rust git pkg-config
       - uses: ./.github/actions/set-make-job-count
       - name: build
@@ -84,6 +95,12 @@ jobs:
         run: |
           ${{env.CCACHE_SETTINGS}}
           ${{env.BUILD_DEFAULT}}
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: C:\Users\runneradmin\AppData\Local\ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   build-arch:
     name: 'Arch Linux'
@@ -98,7 +115,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: ~/.cache/ccache
           key: ccache-arch-build-${{ github.sha }}
@@ -110,6 +129,12 @@ jobs:
         run: |
           ${{ env.CCACHE_SETTINGS }}
           ${{ env.BUILD_DEFAULT }}
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: ~/.cache/ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   build-debian:
     # Oldest supported Debian version
@@ -133,7 +158,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: ~/.cache/ccache
           key: ccache-debian-11-build-${{ github.sha }}
@@ -145,6 +172,12 @@ jobs:
         run: |
           ${{ env.CCACHE_SETTINGS }}
           ${{ env.BUILD_DEFAULT }}
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: ~/.cache/ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   build-ubuntu:
     name: ${{ matrix.name }}
@@ -174,7 +207,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: ~/.cache/ccache
           key: ccache-${{ matrix.container }}-build-${{ github.sha }}
@@ -186,6 +221,12 @@ jobs:
         run: |
           ${{env.CCACHE_SETTINGS}}
           ${{env.BUILD_DEFAULT}}
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: ~/.cache/ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   test-ubuntu:
     name: "${{ matrix.name }} (tests)"
@@ -221,7 +262,9 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
-      - uses: actions/cache@v5
+      - name: restore ccache
+        uses: actions/cache/restore@v5
+        id: ccache-restore
         with:
           path: ~/.cache/ccache
           key: ccache-${{ matrix.container }}-build-${{ github.sha }}
@@ -238,6 +281,12 @@ jobs:
           ${{env.CCACHE_SETTINGS}}
           ${{env.BUILD_DEFAULT}}
           cmake --build build --target test
+      - name: save ccache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+        with:
+          path: ~/.cache/ccache
+          key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
 
   source-archive:
     name: "source archive"
diff --git a/.github/workflows/depends.yml b/.github/workflows/depends.yml
index ea694975e..96a344cbc 100644
--- a/.github/workflows/depends.yml
+++ b/.github/workflows/depends.yml
@@ -104,21 +104,21 @@ jobs:
         fetch-depth: 0
         submodules: recursive
 # Most volatile cache
-    - name: ccache
-      uses: actions/cache@v5
+    - name: restore ccache
+      uses: actions/cache/restore@v5
+      id: ccache-restore
       with:
         path: ~/.cache/ccache
         key: ccache-${{ matrix.toolchain.host }}-${{ github.sha }}
         restore-keys: ccache-${{ matrix.toolchain.host }}-
 # Less volatile cache
-    - name: depends cache
-      uses: actions/cache@v5
+    - name: restore depends cache
+      uses: actions/cache/restore@v5
+      id: depends-restore
       with:
         path: contrib/depends/built
         key: depends-${{ matrix.toolchain.host }}-${{ hashFiles('contrib/depends/packages/*') }}
-        restore-keys: |
-          depends-${{ matrix.toolchain.host }}-${{ hashFiles('contrib/depends/packages/*') }}
-          depends-${{ matrix.toolchain.host }}-
+        restore-keys: depends-${{ matrix.toolchain.host }}-
     - name: prepare w64-mingw32
       if: ${{ matrix.toolchain.host == 'x86_64-w64-mingw32' }}
       run: |
@@ -129,6 +129,18 @@ jobs:
       run: |
         ${{env.CCACHE_SETTINGS}}
         make depends target=${{ matrix.toolchain.host }} -j${{env.MAKE_JOB_COUNT}}
+    - name: save ccache
+      uses: actions/cache/save@v5
+      if: github.event_name != 'pull_request' && steps.ccache-restore.outputs.cache-hit != 'true'
+      with:
+        path: ~/.cache/ccache
+        key: ${{ steps.ccache-restore.outputs.cache-primary-key }}
+    - name: save depends cache
+      uses: actions/cache/save@v5
+      if: github.event_name != 'pull_request' && steps.depends-restore.outputs.cache-hit != 'true'
+      with:
+        path: contrib/depends/built
+        key: ${{ steps.depends-restore.outputs.cache-primary-key }}
     - uses: actions/upload-artifact@v7
       if: ${{ matrix.toolchain.host == 'x86_64-w64-mingw32' || matrix.toolchain.host == 'x86_64-apple-darwin' || matrix.toolchain.host == 'arm64-apple-darwin' || matrix.toolchain.host == 'x86_64-unknown-linux-gnu' }}
       with:
diff --git a/.github/workflows/guix.yml b/.github/workflows/guix.yml
index e570ca769..0e01ecaab 100644
--- a/.github/workflows/guix.yml
+++ b/.github/workflows/guix.yml
@@ -23,15 +23,21 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 0
-      - name: depends sources cache
+      - name: restore depends sources cache
         id: cache
-        uses: actions/cache@v5
+        uses: actions/cache/restore@v5
         with:
           path: contrib/depends/sources
           key: sources-${{ hashFiles('contrib/depends/packages/*') }}
       - name: download depends sources
         if: steps.cache.outputs.cache-hit != 'true'
         run: make -C contrib/depends download
+      - name: save depends sources cache
+        uses: actions/cache/save@v5
+        if: github.event_name != 'pull_request' && steps.cache.outputs.cache-hit != 'true'
+        with:
+          path: contrib/depends/sources
+          key: ${{ steps.cache.outputs.cache-primary-key }}
 
   build-guix:
     runs-on: ubuntu-24.04