error:
       … while evaluating the attribute 'drvPath'
         at «https://releases.nixos.org/nixos/unstable/nixos-26.05pre921484.fb7944c166a3/nixexprs.tar.xz?narHash=sha256-3xDI4xtzovwqE/eAxCwmXxUqBg6Yoam2L1u0IwRNhW4%3D»/lib/customisation.nix:446:7:
          445|     // {
          446|       drvPath =
             |       ^
          447|         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.virtualisation.qemu.options':

       … while evaluating definitions from `/nix/store/46cy1srfbxfmbg6xsj5k2zy9g0y1caqh-source/nixos/modules/virtualisation/qemu-vm.nix':

       … while evaluating the option `nodes.server.virtualisation.additionalPaths':

       … while evaluating definitions from `the argument that was passed to pkgs.runNixOSTest':

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

       error: attribute 'site-extensions-versions-17' missing
       at «git+file:///var/lib/nixbot/worktrees/1-a8cb33493df0-17?ref=HEAD&rev=4825f19132801661c2a50df23c9fada95d1e6ae0»/nix/ext/tests/site-extensions-upgrade.nix:22:5:
           21|   pinnedPackage =
           22|     self.legacyPackages.${system}."site-extensions-versions-17".${pinnedExtension}.${pinnedVersion};
             |     ^
           23|