build checks.x86_64-linux.shell

Reproduce this run
  1. 0.02 s $ /nix/store/vzx1mi9c0xfadmsm9dhd83d005cb1qs9-coreutils-9.8/bin/timeout --kill-after=15s 7200s /nix/store/99b1z08awpxj8b6mzggn59gp1shljnff-nix-2.34.5/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --log-format internal-json build --no-link git+https://github.com/NorfairKing/sydtest?ref=multi-suite-mutation-testing&rev=ecd62e788f7dc46fde6c348bcaf35a90bf1f7913#checks.x86_64-linux.shell --print-build-logs
  2. 0.08 s warning: ignoring untrusted flake configuration setting 'extra-substituters'.
  3. 0.08 s Pass '--accept-flake-config' to trust it
  4. 0.08 s warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
  5. 0.08 s Pass '--accept-flake-config' to trust it
  6. 0.54 s error (ignored): SQLite database '/var/cache/private/nix-ci-worker/eval-cache-v6/56bd793b51ec4dd1e6080da87222229646e01086c0572d382bef04622bca4d3b.sqlite' is busy
  7. 1.98 s