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.server.networking.interfaces':

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

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

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

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

       … while evaluating definitions from `/nix/store/iyikncyr4km1km40nr3a5id31d5w6mkb-source/nixosModules/clanCore/nixos-facter.nix':

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

       error: build of '/nix/store/na14dkk4vq4fwaah7jzaxi25xqd3a3g7-merged-test-dir-packages.drv^out' failed: error: error: gRPC AddMultipleToStore on 'nix-store.geninf.io:50051' failed: error: path '/nix/store/4qxqdf020rgf157mcd5iqbm9s3dxpl7n-test-vars-generated.drv' is required, but there is no substituter that can build it