Doc: init stdenv.mkDerivation doc-comment (#343031)

  inherit (import ../../build-support/lib/cmake.nix { inherit lib stdenv; }) makeCMakeFlags;

  inherit (import ../../build-support/lib/meson.nix { inherit lib stdenv; }) makeMesonFlags;

  /**

    This function creates a derivation, and returns it in the form of a [package attribute set](https://nix.dev/manual/nix/latest/glossary#package-attribute-set)

    that refers to the derivation's outputs.

    `mkDerivation` takes many argument attributes, most of which affect the derivation environment,

    but [`meta`](#chap-meta) and [`passthru`](#var-stdenv-passthru) only directly affect package attributes.

    The `mkDerivation` argument attributes can be made to refer to one another by passing a function to `mkDerivation`.

    See [Fixed-point argument of `mkDerivation`](#mkderivation-recursive-attributes).

    Reference documentation see: https://nixos.org/manual/nixpkgs/stable/#sec-using-stdenv

    :::{.note}

    This is used as the fundamental building block of most other functions in Nixpkgs for creating derivations.

    Most Arguments are transparently forwarded to [`builtins.derivation`](https://nixos.org/manual/nix/stable/language/derivations).

    :::

  */

  mkDerivation =

    fnOrAttrs:

      if builtins.isFunction fnOrAttrs