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

       … while evaluating derivation 'run-tests-rust_ironstar-0.1.0'
         whose name attribute is located at «https://releases.nixos.org/nixos/unstable-small/nixos-26.11pre1077334.5c5a02c74160/nixexprs.tar.xz?narHash=sha256-0KRCqz5YHYN0x7iEbzVO1Z0OtcNtYrij7qNo7CQLWfM%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'buildPhase' of derivation 'run-tests-rust_ironstar-0.1.0'
         at «git+file:///var/lib/nixbot/worktrees/8-ea824b3cb0c8-9?ref=HEAD&rev=18848e3f248f1739337d44de2812441a14e0cd57»/Cargo.nix:28847:13:
        28846|
        28847|             buildPhase = ''
             |             ^
        28848|               set -e

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

       error: fetchPnpmDeps: `fetcherVersion = 2` was removed in the 26.11 release. Please migrate `ironstar-frontend` to `fetcherVersion = 4` and regenerate the hash. See https://nixos.org/manual/nixpkgs/stable/#javascript-pnpm-fetcherVersion.