diff --git a/.github/workflows/ci-bzl-projects.yaml b/.github/workflows/ci-bzl-projects.yaml
index b556b6e..ddd84bf 100644
--- a/.github/workflows/ci-bzl-projects.yaml
+++ b/.github/workflows/ci-bzl-projects.yaml
@@ -29,5 +29,7 @@ jobs:
         uses: cachix/install-nix-action@v15
         with:
           nix_path: nixpkgs=channel:nixos-unstable
+          extra_nix_config: |
+            experimental-features = nix-command flakes
       - name: Build all
         run: ./nix-shell.sh -- --run 'cd projects/${{ matrix.project }}; bazel build //...'
diff --git a/scripts/shell.sh b/scripts/shell.sh
index bba51d2..3fe111c 100755
--- a/scripts/shell.sh
+++ b/scripts/shell.sh
@@ -115,6 +115,7 @@ verify_nix_daemon_config_compatibility() {
   # said logic. 
   # Therefore "experimental-features = nix-command" are needed.
 
+  mkdir -p "${CACHE_ROOT}"
   # Why not $(nix show-config)? It fails with cryptic 'access-tokens: command not found'
   nix show-config --json > "${global_nix_conf_settings}" 2>/dev/null
   # shellcheck disable=SC2181