ci: fix failing tests

.forgejo/workflows/test.yml

@@ -16,10 +16,12 @@ jobs:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
         with:
-          extra_nix_config:
-            sandbox = false # https://github.com/NixOS/nix/issues/11295#issue-2465024678
+          extra_nix_config: | # https://github.com/NixOS/nix/issues/11295 
+            sandbox = true
       - run: nix profile install nixpkgs#devenv
       - uses: rharkor/caching-for-turbo@v1.8
+      - run: ls -lah /homeless-shelter
+      - run: rm -rf /homeless-shelter
       - name: Run tests
         shell: devenv shell bash -- -e {0}
         run: |