Unbreaks evaluation after the refactoring in
86c28ee650
(https://github.com/NixOS/nixpkgs/pull/282220).
Explicitly extending nvcc's LIBRARIES may have been redundant (building
something mildly cursed like jaxlib may be necessary to verify)
Previously:
```
❯ NIXPKGS_ALLOW_UNFREE=1 nix-instantiate '.' -A tests.cuda
...
error: necessary to fix CI
❯ nix build -f '.' --arg config '{ allowUnfree = true; }' -L python3Packages.torchWithCuda
...
error: necessary to fix CI
```
Now:
```
❯ NIXPKGS_ALLOW_UNFREE=1 nix-instantiate '.' -A tests.cuda
/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-cuda-samples-12.2.drv
/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-saxpy-unstable-2023-07-11.drv
...
```
e48abe92fd