diff --git a/.github/workflows/build_all.yml b/.github/workflows/build_all.yml
index 570d3203ed..ae5231e784 100644
--- a/.github/workflows/build_all.yml
+++ b/.github/workflows/build_all.yml
@@ -100,7 +100,7 @@ jobs:
       matrix:
         include: ${{ fromJSON(vars.SELF_HOSTED
           && '[{"arch":"x64","os":"orca-win-server","compiler":"clang"}]'
-          || '[{"arch":"x64","os":"windows-latest","compiler":"clang"},{"arch":"arm64","os":"windows-11-arm","compiler":"clang"}]') }}
+          || '[{"arch":"x64","os":"windows-latest","compiler":"clang"},{"arch":"arm64","os":"windows-11-vs2026-arm","compiler":"clang"}]') }}
     needs: check_build_script
     # Don't run scheduled builds on forks:
     if: ${{ !cancelled() && needs.check_build_script.result == 'success' && (github.event_name != 'schedule' || github.repository == 'OrcaSlicer/OrcaSlicer') }}
@@ -169,7 +169,7 @@ jobs:
     if: ${{ !cancelled() && success() && !vars.SELF_HOSTED }}
     uses: ./.github/workflows/unit_tests.yml
     with:
-      os: windows-11-arm
+      os: windows-11-vs2026-arm
       artifact: ${{ github.sha }}-tests-windows-arm64
       test-dir: build-arm64/tests
   unit_tests_macos_arm64:
diff --git a/.github/workflows/build_orca.yml b/.github/workflows/build_orca.yml
index 1b7fd37a0f..4b53767d4f 100644
--- a/.github/workflows/build_orca.yml
+++ b/.github/workflows/build_orca.yml
@@ -96,12 +96,14 @@ jobs:
         id: ccache
         if: ${{ !inputs.macos-combine-only }}
         continue-on-error: true
-        uses: hendrikmuhs/ccache-action@v1.2
+        uses: hendrikmuhs/ccache-action@v1.2.24
         with:
           key: ${{ env.CCACHE_LEG }}
           max-size: 3G
           restore: false
           save: false
+          # ccache -s runs as its own step; no summary table per job.
+          job-summary: ''
 
       - name: Restore compiler cache
         if: ${{ steps.ccache.outcome == 'success' }}
diff --git a/.github/workflows/doxygen-docs.yml b/.github/workflows/doxygen-docs.yml
index 6af7255fa3..d7d2f982e7 100644
--- a/.github/workflows/doxygen-docs.yml
+++ b/.github/workflows/doxygen-docs.yml
@@ -19,11 +19,18 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: thejerrybao/setup-swap-space@v1
-        with:
-          swap-space-path: /swapfile
-          swap-size-gb: 8
-          remove-existing-swap-files: true
+      # Doxygen with call graphs over all of src/ outgrows the runner's RAM;
+      # replace the runner's swapfile with an 8 GB one.
+      - name: Grow swap space
+        run: |
+          set -euo pipefail
+          sudo swapoff -a
+          sudo rm -f /swapfile
+          sudo fallocate -l 8G /swapfile
+          sudo chmod 600 /swapfile
+          sudo mkswap /swapfile
+          sudo swapon /swapfile
+          free -h
 
       - name: Checkout repository
         uses: actions/checkout@v7