build checks.x86_64-linux.shell

Reproduce this run
  1. 0.16 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/centjes?ref=master&rev=1ac160941296a27db377b2a711c9f5f255d74fb9#checks.x86_64-linux.shell --print-build-logs
  2. 0.19 s warning: ignoring untrusted flake configuration setting 'extra-substituters'.
  3. 0.19 s Pass '--accept-flake-config' to trust it
  4. 0.19 s warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'.
  5. 0.19 s Pass '--accept-flake-config' to trust it
  6. 8.57 s
  7. 8.80 s /nix/store/l3r8m6m13fy106nvwk6wyp5si6smll41-centjes-shell
  8. 8.89 s Build succeeded.