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 «https://releases.nixos.org/nixos/26.05/nixos-26.05.12192.8ce73368d1ef/nixexprs.tar.xz?narHash=sha256-fgbb%2BlnywgXIYBCe0u3OxyebrCN1z8kfFhXH1dyv93A%3D»/pkgs/stdenv/generic/make-derivation.nix:647:11

       … while evaluating attribute '__impureHostDeps' of derivation 'nix-shell'
         at «https://releases.nixos.org/nixos/26.05/nixos-26.05.12192.8ce73368d1ef/nixexprs.tar.xz?narHash=sha256-fgbb%2BlnywgXIYBCe0u3OxyebrCN1z8kfFhXH1dyv93A%3D»/pkgs/stdenv/generic/make-derivation.nix:816:11:
          815|             unique (computedPropagatedSandboxProfile ++ [ propagatedSandboxProfile ]);
          816|           ${if buildIsDarwin then "__impureHostDeps" else null} =
             |           ^
          817|             let

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

       error: Refusing to evaluate package 'pnpm-10.34.0' in /nix/store/yqlqyj2bswr8fsmkgdzz5hfqprswigr4-source/pkgs/development/tools/pnpm/generic.nix:170 because it is marked as insecure

       Known issues:
        - CVE-2026-55487
        - CVE-2026-55698
        - CVE-2026-55180
        - CVE-2026-55697
        - CVE-2026-59194
        - CVE-2026-59195
        - CVE-2026-59196
        - CVE-2026-82392
        - CVE-2026-82393

       You can install it anyway by allowing this package, using the
       following methods:

       a) To temporarily allow all insecure packages, you can use an environment
          variable for a single invocation of the nix tools:

            $ export NIXPKGS_ALLOW_INSECURE=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) for `nixos-rebuild` you can add ‘pnpm-10.34.0’ to
          `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
          like so:

            {
              nixpkgs.config.permittedInsecurePackages = [
                "pnpm-10.34.0"
              ];
            }

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
          ‘pnpm-10.34.0’ to `permittedInsecurePackages` in
          ~/.config/nixpkgs/config.nix, like so:

            {
              permittedInsecurePackages = [
                "pnpm-10.34.0"
              ];
            }