this derivation will be built:
  /nix/store/bccvzg56cz913nfynrkj7hsvs06g02x2-acl2-8.5.drv
error: build of '/nix/store/bccvzg56cz913nfynrkj7hsvs06g02x2-acl2-8.5.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=20&system=aarch64-linux' failed: Cannot build '/nix/store/bccvzg56cz913nfynrkj7hsvs06g02x2-acl2-8.5.drv'.
       Reason: builder failed with exit code 2.
       Output paths:
         /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5
       Last 25 log lines:
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/dpss/Collins/level-1-initial-synchronization.cert (254.799s) at 12-Oct-2026 21:19:22.004
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/doppelgangers.cert (230.789s) at 12-Oct-2026 21:19:38.392
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-apply.cert on 12-Oct-2026 21:19:38.434
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/defattach-demo.cert on 12-Oct-2026 21:19:38.436
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/defattach-demo.cert (1.717s) at 12-Oct-2026 21:19:40.157
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-apply.cert (10.604s) at 12-Oct-2026 21:19:49.061
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-user-defs.cert on 12-Oct-2026 21:19:49.098
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-user-defs.cert (6.617s) at 12-Oct-2026 21:19:55.721
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-lemmas.cert on 12-Oct-2026 21:19:55.757
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/doppelgangers.cert (226.879s) at 12-Oct-2026 21:21:10.972
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-apply.cert on 12-Oct-2026 21:21:11.005
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/defattach-demo.cert on 12-Oct-2026 21:21:11.005
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/defattach-demo.cert (3.815s) at 12-Oct-2026 21:21:14.826
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-apply.cert (12.615s) at 12-Oct-2026 21:21:23.639
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-user-defs.cert on 12-Oct-2026 21:21:23.674
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-user-defs.cert (7.075s) at 12-Oct-2026 21:21:30.755
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-lemmas.cert on 12-Oct-2026 21:21:30.791
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/evaluation-lemmas.cert (243.525s) at 12-Oct-2026 21:23:59.288
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/all-warrants-valid.cert on 12-Oct-2026 21:23:59.322
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model/ex2/all-warrants-valid.cert (1.943s) at 12-Oct-2026 21:24:01.271
       > make[1]: Leaving directory '/nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model'
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/evaluation-lemmas.cert (316.289s) at 12-Oct-2026 21:26:47.086
       > Making /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/all-warrants-valid.cert on 12-Oct-2026 21:26:47.119
       > Built /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2/ex2/all-warrants-valid.cert (1.818s) at 12-Oct-2026 21:26:48.941
       > make[1]: Leaving directory '/nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5/share/acl2/books/projects/apply-model-2'
       For full logs, run:
         nix log /nix/store/bccvzg56cz913nfynrkj7hsvs06g02x2-acl2-8.5.drv
error: Cannot build '/nix/store/bccvzg56cz913nfynrkj7hsvs06g02x2-acl2-8.5.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/p904gdkh45lgfwimybi61nx2yia6jznz-acl2-8.5