Motivation for this change

CPU-X is a Free software that gathers information on CPU, motherboard and more.
CPU-X is similar to CPU-Z (Windows), but CPU-X is a Free and Open Source software designed for GNU/Linux; also, it works on *BSD.
This software is written in C and built with CMake tool.
It can be used in graphical mode by using GTK or in text-based mode by using NCurses. A dump mode is present from command line.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.