$ /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/really-safe-money?ref=mutation-testing&rev=8bcc9f7c630755897b64eb7a8bdfa445d8f88ce4#checks.x86_64-linux.coverage-report --print-build-logs warning: ignoring untrusted flake configuration setting 'extra-substituters'. Pass '--accept-flake-config' to trust it warning: ignoring untrusted flake configuration setting 'extra-trusted-public-keys'. Pass '--accept-flake-config' to trust it  Downloading cached test-coverage-report from https://cache.staging.nix-ci.com Progress: 0 of 1 built, 1 of 2 downloaded from cache Downloading cached test-coverage-report-checked from https://cache.staging.nix-ci.com Progress: 0 of 1 built, 2 of 2 downloaded from cache