nix shell failure

[zees-dev]

The quickstart (first step) for installing and running fuel seems to be failing:

> nix shell github:fuellabs/fuel.nix#fuel-testnet

error:
       … while evaluating the attribute 'packages'
         at /nix/store/kjnfmrjr6c7565k84yma9lp9cfahkhv1-source/flake.nix:269:7:
          268|     in rec {
          269|       packages = mkPackages pkgs;
             |       ^
          270|       devShells = mkDevShells pkgs packages;

       … in the right operand of the update (//) operator
         at /nix/store/kjnfmrjr6c7565k84yma9lp9cfahkhv1-source/flake.nix:195:7:
          194|       packagesPublished
          195|       // packagesNightly
             |       ^
          196|       // packagesPublishedLatest

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

       error: stack overflow; max-call-depth exceeded
       at /nix/store/khbvilmsrv4l69nwd52h27j1mp44a0xi-source/lib/lists.nix:127:14:
          126|         then nul
          127|         else op (elemAt list n) (fold' (n + 1));
             |              ^
          128|     in fold' 0;

[zees-dev]

Ideally i'd expect CI to catch this sort of issue (if it's not local to my PC); a fix for this should also fix the CI so it does not happen again.