Do not install unnecessary cross-compilation toolchain for cargo deb

.github/workflows/deploy.yml

@@ -76,25 +76,14 @@ jobs:
               tar -vczf "${ARCHIVE_NAME}.tar.gz" "$ARCHIVE_NAME"/*;;
           esac
 
-      - name: Set up Ubuntu multiarch
-        if: matrix.target == 'aarch64-unknown-linux-gnu'
-        run: |
-          readonly DISTRO_CODENAME=jammy
-          sudo dpkg --add-architecture arm64
-          sudo sed -i "s/^deb http/deb [arch=$(dpkg-architecture -q DEB_HOST_ARCH)] http/" /etc/apt/sources.list
-          sudo sed -i "s/^deb mirror/deb [arch=$(dpkg-architecture -q DEB_HOST_ARCH)] mirror/" /etc/apt/sources.list
-          for suite in '' '-updates' '-backports' '-security'; do
-            echo "deb [arch=arm64] http://ports.ubuntu.com/ $DISTRO_CODENAME$suite main universe multiverse" | \
-            sudo tee -a /etc/apt/sources.list >/dev/null
-          done
-
       - name: Install QEMU and AArch64 cross compiler
         if: matrix.target == 'aarch64-unknown-linux-gnu'
         run: |
           sudo apt-get -yq update
-          # libc6 must be present to run executables dynamically linked
-          # against glibc for the target architecture
-          sudo apt-get -yq install qemu-user gcc-aarch64-linux-gnu libc6:arm64
+          # The shared libc AArch64 libraries are needed for cargo deb below
+          # to be able to infer package requirements with dpkg-shlibdeps
+          # properly
+          sudo apt-get -yq install libc6-arm64-cross libgcc-s1-arm64-cross
 
       - name: Build deb archives
         if: endsWith(matrix.target, '-linux-gnu')