diff --git a/.github/workflows/build-then-cache.yaml b/.github/workflows/build-then-cache.yaml
index 28f4981..8053958 100644
--- a/.github/workflows/build-then-cache.yaml
+++ b/.github/workflows/build-then-cache.yaml
@@ -17,5 +17,5 @@ jobs:
           cache: ${{ secrets.ATTIC_CACHE }}
           token: ${{ secrets.ATTIC_TOKEN }}
       # free useless disk space
-      - run: 'curl https://raw.githubusercontent.com/apache/arrow/31747f067a6ae29eca2d9bc68748500a8163d83e/ci/scripts/util_free_space.sh | bash'
+      - run: 'bash ci/util_free_space_extreme.sh'
       - run: 'nix build .#nixosConfigurations.nullbox.config.system.build.toplevel'
diff --git a/.github/workflows/proactive-update.yaml b/.github/workflows/proactive-update.yaml
index 4cd8cb0..fd2c39d 100644
--- a/.github/workflows/proactive-update.yaml
+++ b/.github/workflows/proactive-update.yaml
@@ -20,7 +20,7 @@ jobs:
           cache: ${{ secrets.ATTIC_CACHE }}
           token: ${{ secrets.ATTIC_TOKEN }}
       # free useless disk space
-      - run: 'curl https://raw.githubusercontent.com/apache/arrow/31747f067a6ae29eca2d9bc68748500a8163d83e/ci/scripts/util_free_space.sh | bash'
+      - run: 'bash ci/util_free_space_extreme.sh'
       - run: 'nix flake update'
       - run: 'nix build .#nixosConfigurations.rpi4.config.system.build.toplevel'
 
@@ -36,7 +36,7 @@ jobs:
           cache: ${{ secrets.ATTIC_CACHE }}
           token: ${{ secrets.ATTIC_TOKEN }}
       # free useless disk space
-      - run: 'curl https://raw.githubusercontent.com/apache/arrow/31747f067a6ae29eca2d9bc68748500a8163d83e/ci/scripts/util_free_space.sh | bash'
+      - run: 'bash ci/util_free_space_extreme.sh'
       - run: 'nix flake update'
       - run: 'nix build .#nixosConfigurations.nullbox.config.system.build.toplevel'
       - run: 'nix build .#nixosConfigurations.slab.config.system.build.toplevel'