haskellPackages.ghc-settings-edit: avoid the use of filesets (#346733)

mkDerivation {

  pname = "ghc-settings-edit";

  version = "0.1.0";

  src = lib.fileset.toSource {

    root = ./.;

    fileset = lib.fileset.unions [

      ./Setup.hs

      ./ghc-settings-edit.lhs

      ./ghc-settings-edit.cabal

    ];

  src = builtins.path {

    path = ./.;

    name = "source";

    filter = path: _: (builtins.baseNameOf path) != "default.nix";

  };

  isLibrary = false;

  isExecutable = true;