pkgs.substitute

The following is the current implementation of this function.

args:

let
  name = if args ? name then args.name else baseNameOf (toString args.src);
  deprecationReplacement = lib.pipe args.replacements [
    lib.toList
    (map (lib.splitString " "))
    lib.concatLists
    (lib.concatMapStringsSep " " lib.strings.escapeNixString)
  ];
  optionalDeprecationWarning =
    # substitutions is only available starting 24.05.
    # TODO: Remove support for replacements sometime after the next release
    lib.warnIf (args ? replacements && lib.oldestSupportedReleaseIsAtLeast 2405) ''
      pkgs.substitute: For "${name}", `replacements` is used, which is deprecated since it doesn't support arguments with spaces. Use `substitutions` instead:
        substitutions = [ ${deprecationReplacement} ];'';
in
optionalDeprecationWarning stdenvNoCC.mkDerivation (
  {
    inherit name;
    builder = ./substitute.sh;
    inherit (args) src;
    preferLocalBuild = true;
    allowSubstitutes = false;
  }
  // args
  // lib.optionalAttrs (args ? substitutions) {
    substitutions =
      assert
        lib.isList args.substitutions
        || throw ''pkgs.substitute: For "${name}", `substitutions` is passed, which is expected to be a list, but it's a ${builtins.typeOf args.substitutions} instead.'';
      lib.escapeShellArgs args.substitutions;
  }
)