python3Packages.gdown: add missing dependency

pkgs/development/python-modules/gdown/default.nix

@@ -1,4 +1,5 @@
 { lib
+, beautifulsoup4
 , buildPythonApplication
 , fetchPypi
 , filelock
@@ -11,18 +12,30 @@
 buildPythonApplication rec {
   pname = "gdown";
   version = "4.2.0";
+  format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "bd871c125242a9d3691aa74f360b6b5268a58c13991bb2405fdb3ec3028307dc";
   };
 
-  propagatedBuildInputs = [ filelock requests tqdm setuptools six ];
+  propagatedBuildInputs = [
+    beautifulsoup4
+    filelock
+    requests
+    tqdm
+    setuptools
+    six
+  ];
 
   checkPhase = ''
     $out/bin/gdown --help > /dev/null
   '';
 
+  pythonImportsCheck = [
+    "gdown"
+  ];
+
   meta = with lib; {
     description = "A CLI tool for downloading large files from Google Drive";
     homepage = "https://github.com/wkentaro/gdown";