fix apt cache

Author: roivanov

.github/workflows/conda-python-build.yaml

@@ -113,10 +113,22 @@ jobs:
           restore-keys: |
             apt-archives-${{ matrix.ARCH }}-
       - name: Install required packages
+        env:
+          DEBIAN_FRONTEND: noninteractive
         run: |
-          du -sh /var/cache/apt/archives
-          apt update
-          apt install -y jq gh unzip curl gettext
+          set -euo pipefail
+          # Ubuntu/Debian Docker bases ship docker-clean: Post-Invoke hooks that rm archives/*.deb after
+          # every dpkg run and after apt update — that empties /var/cache/apt/archives no matter what
+          # Keep-Downloaded-Packages says. Remove it so actions/cache on the default path can work.
+          rm -f /etc/apt/apt.conf.d/docker-clean
+          # Sorts after docker-* / 70debconf on Miniforge/Ubuntu images (see ls /etc/apt/apt.conf.d).
+          printf '%s\n' \
+            'APT::Keep-Downloaded-Packages "true";' \
+            'Binary::apt::APT::Keep-Downloaded-Packages "true";' \
+            'Binary::apt-get::APT::Keep-Downloaded-Packages "true";' \
+            > /etc/apt/apt.conf.d/numbast-keep-apt-debs.conf
+          apt-get update
+          apt-get install -y jq gh unzip curl gettext
       - name: Add Rapids tools
         run: |
           mkdir gha-tools
@@ -185,14 +197,15 @@ jobs:
         id: cache-sccache
         uses: actions/cache@v5
         with:
-          path: ~/.sccache
+          # Miniforge job container runs as root; ~/.sccache is /root/.sccache
+          path: /root/.sccache
           key: sccache-${{ matrix.ARCH }}-${{ matrix.PY_VER }}
       - name: Check sccache
         if: steps.cache-sccache.outputs.cache-hit == 'true'
         run: |
           set -x
-          ls -lh path: ~/.sccache
-          du -sh path: ~/.sccache
+          ls -lh "${HOME}/.sccache"
+          du -sh "${HOME}/.sccache"
       - name: Build Conda Package
         run: ${{ inputs.script }}
         env: