khard: fix eval, add import check

pkgs/applications/misc/khard/default.nix

@@ -17,10 +17,9 @@ python3.pkgs.buildPythonApplication rec {
   propagatedBuildInputs = with python3.pkgs; [
     atomicwrites
     configobj
-    vobject
     ruamel-yaml
-    ruamel_base
     unidecode
+    vobject
   ];
 
   postInstall = ''
@@ -32,6 +31,8 @@ python3.pkgs.buildPythonApplication rec {
     export COLUMNS=80
   '';
 
+  pythonImportsCheck = [ "khard" ];
+
   meta = {
     homepage = "https://github.com/scheibler/khard";
     description = "Console carddav client";