Motivation for this change

The caml-mode package is extracted by Melpa from the full Ocaml repository. That repository contains a file called "configure" with non-standard arguments, which is not needed to build/extract the Emacs mode. Nevertheless we automatically run configure as part of configurePhase, and it breaks due to the non-standard arguments, which breaks the build as a whole.

I don't think is the correct way to disable configurePhase, but this at least works on my system.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• 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 nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.