error:
       … while evaluating the attribute 'drvPath'
         at «https://releases.nixos.org/nixos/26.05/nixos-26.05.11045.774debe7a0d1/nixexprs.tar.xz?narHash=sha256-S5MjznoY0gbQbcANPLz5RYjg%2B5/WQmFRgNbHcP%2Bydcg%3D»/lib/customisation.nix:427:7:
          426|     // {
          427|       drvPath =
             |       ^
          428|         assert condition;

       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating the option `nodes.machine.networking.interfaces':

       … while evaluating definitions from `/nix/store/csk881ggvmifg4qf1cal0r1ffflbmlhp-source/nixos/modules/hardware/facter/networking':

       … while evaluating the option `nodes.machine.hardware.facter.enable':

       … while evaluating the option `nodes.machine.hardware.facter.report':

       … while evaluating the option `nodes.machine.hardware.facter.reportPath':

       … while evaluating definitions from `/nix/store/i71vl6fvswjpiqifiy5mm3q5m0q9043p-source/nixosModules/clanCore/nixos-facter.nix':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: build of '/nix/store/1k4q4h7b0264nnw73rgmiyag11gv3b9k-merged-test-dir-matrix-synapse.drv^out' failed: error: error: gRPC BuildDerivation on 'nix-store.geninf.io:50051' failed: build-x86-01: missing: /nix/store/1k4q4h7b0264nnw73rgmiyag11gv3b9k-merged-test-dir-matrix-synapse.drv