Python 3.10 ML nix-shell

shell.nix

# export NIXPKGS_ALLOW_UNFREE=1

{ pkgs ? import <nixpkgs> { } }:
(pkgs.buildFHSUserEnv {
  name = "pipzone";
  targetPkgs = pkgs: (with pkgs; [
    stdenv
    portaudio
    pkg-config
    binutils
    glibc
    gcc
    gfortran
    gfortran.cc    
    python310
    python310Packages.sounddevice
    python310Packages.pip
    python310Packages.virtualenv
    cudaPackages.cudatoolkit
  ]);
  runScript = "bash";
}).env

I can now find gcc, however a g++ fails to compile a small program such as this. :-(

test_g++.sh

#!/bin/bash

echo "nix-shell -p gcc # appears to be able to run and build this despite pkgconfig not being found!"

set -x
rm -f static
g++ -o static $(pkgconfig --libs --cflags openssl) -x c++ - <<EOF
#include <iostream>
int main() {
      std::cout << "Hello World!\n";
}
EOF

ls -l static