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

       … while evaluating derivation 'nix-shell'
         whose name attribute is located at «github:NixOS/nixpkgs/104240a772428cc2e20d8fd86c9ddbb886bbaff2?narHash=sha256-D740uKsMbgsfK2oaDenJLLPIZfq7W0/g4KN/Fls8eKs%3D»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'buildInputs' of derivation 'nix-shell'
         at «github:NixOS/nixpkgs/104240a772428cc2e20d8fd86c9ddbb886bbaff2?narHash=sha256-D740uKsMbgsfK2oaDenJLLPIZfq7W0/g4KN/Fls8eKs%3D»/pkgs/stdenv/generic/make-derivation.nix:722:11:
          721|           depsHostHost = hostHostOutputs;
          722|           buildInputs = hostTargetOutputs;
             |           ^
          723|           depsTargetTarget = targetTargetOutputs;

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

       error: string '"v0.8.1"' is not equal to string '"v0.7.0"'