build checks.x86_64-linux.shell

Reproduce this run
  1. 0.10 s $ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --log-format internal-json build --no-link --print-out-paths git+https://github.com/NorfairKing/sydtest?ref=mutation-redundancy&rev=1264c2a674bdf1f7760efc29305b9c89863c2aba#checks.x86_64-linux.shell --print-build-logs
  2. 0.12 s warning: ignoring untrusted flake configuration setting 'extra-substituters'.
  3. 0.12 s Pass '--accept-flake-config' to trust it
  4. 0.12 s warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
  5. 0.12 s Pass '--accept-flake-config' to trust it
  6. 0.15 s
  7. 0.85 s Downloading cached hoogle-with-packages from https://cache.staging.nix-ci.com
  8. 1.68 s Progress: 0 of 1 built, 1 of 3 downloaded from cache
  9. 1.69 s Downloading cached ghc-9.10.3-with-packages from https://cache.staging.nix-ci.com
  10. 2.86 s Progress: 0 of 1 built, 2 of 3 downloaded from cache
  11. 2.86 s Downloading cached sydtest-shell from https://cache.staging.nix-ci.com
  12. 2.87 s Progress: 0 of 1 built, 3 of 3 downloaded from cache
  13. 2.87 s /nix/store/b3vq3cgccxxvkgc9p2hbbc8g7azbpxng-sydtest-shell
  14. 2.89 s Build succeeded.