pkgs.emacsPackages.callPackage

The following is the current implementation of this function.

fn: args:
    let
      f = if isFunction fn then fn else import fn;
      fargs = functionArgs f;

      # All arguments that will be passed to the function
      # This includes automatic ones and ones passed explicitly
      allArgs = intersectAttrs fargs autoArgs // args;

      # arguments that weren't passed automatically to the function
      unpassedArgs = removeAttrs fargs (attrNames allArgs);

    in
    # if nonempty, check if the function has defaults for those other args
    if unpassedArgs == { } || all (value: value) (attrValues unpassedArgs) then
      makeOverridable f allArgs
    else
      # Only show the error for the first missing argument
      # This needs to be an abort so it can't be caught with `builtins.tryEval`,
      # which is used by nix-env and ofborg to filter out packages that don't evaluate.
      # This way we're forced to fix such errors in Nixpkgs,
      # which is especially relevant with allowAliases = false
      abort (makeErrorMessage autoArgs fn args fargs unpassedArgs)