C++ and libstdc++ not available?

[gabyx]

A better question here:

How to overwrite gcc in `clang*Stdenv`?

I can compile a simple main.cpp with this flake.nix { description = "Cpp Playground"; inputs = { # Nixpkgs (take the systems nixpkgs version) nixpkgs.url = "nixpkgs"; # You can access packages and modules from different nixpkgs revs # at the same time. Here's an working example: nixpkgsStable.url = "github:nixos/nixpkgs/nixos-23.11"; # Also see the 'stable-packages' overlay at 'overlays/default.nix'. }; outputs = { self, nixpkgs, nixpkgsStable, …