diff --git a/client/backend_arguments.py b/client/backend_arguments.py
index c5a3703155e..78d1ac9015f 100644
--- a/client/backend_arguments.py
+++ b/client/backend_arguments.py
@@ -69,7 +69,14 @@ def serialize(self) -> Dict[str, object]:
         }
 
     def get_checked_directory_allowlist(self) -> Set[str]:
-        return {element.path() for element in self.elements}
+        paths = set()
+
+        for element in self.elements:
+            excepted_path = element.path()
+            if excepted_path is not None:
+                paths.add(excepted_path)
+
+        return paths
 
     def cleanup(self) -> None:
         pass
@@ -98,7 +105,14 @@ def serialize(self) -> Dict[str, object]:
         }
 
     def get_checked_directory_allowlist(self) -> Set[str]:
-        return {element.path() for element in self.elements}
+        paths = set()
+
+        for element in self.elements:
+            excepted_path = element.path()
+            if excepted_path is not None:
+                paths.add(excepted_path)
+
+        return paths
 
     def cleanup(self) -> None:
         pass
diff --git a/client/configuration/exceptions.py b/client/configuration/exceptions.py
index fa18852f729..644217e89cc 100644
--- a/client/configuration/exceptions.py
+++ b/client/configuration/exceptions.py
@@ -18,8 +18,3 @@ def __init__(self, message: str) -> None:
 class InvalidPythonVersion(InvalidConfiguration):
     def __init__(self, message: str) -> None:
         super().__init__(message)
-
-
-class InvalidPackage(ValueError):
-    def __init__(self, pkg_name: str) -> None:
-        super().__init__(f"Invalid package: {pkg_name} does not exist.")
diff --git a/client/configuration/search_path.py b/client/configuration/search_path.py
index f11497d8b2c..967a26ccdf4 100644
--- a/client/configuration/search_path.py
+++ b/client/configuration/search_path.py
@@ -44,11 +44,11 @@ def _expand_relative_root(path: str, relative_root: str) -> str:
 
 class Element(abc.ABC):
     @abc.abstractmethod
-    def path(self) -> str:
+    def path(self) -> Union[str, None]:
         raise NotImplementedError()
 
     @abc.abstractmethod
-    def command_line_argument(self) -> str:
+    def command_line_argument(self) -> Union[str, None]:
         raise NotImplementedError()
 
 
@@ -81,9 +81,11 @@ class SitePackageElement(Element):
     package_name: str
     is_toplevel_module: bool = False
 
-    def package_path(self) -> str:
+    def package_path(self) -> Union[str, None]:
         if not self.is_toplevel_module:
-            return self.package_name
+            if os.path.exists(f"{self.site_root}/{self.package_name}"):
+                return self.package_name
+            return None
 
         this_pkg_filter = re.compile(
             r"{}-([0-99]\.)*dist-info(/)*.*".format(self.package_name)
@@ -100,7 +102,7 @@ def package_path(self) -> str:
                 dist_info_path = f"{self.site_root}/{directory}"
                 break
         else:
-            raise exceptions.InvalidPackage(self.package_name)
+            return None
 
         not_toplevel_patterns: Tuple[re.Pattern[str], re.Pattern[str]] = (
             this_pkg_filter,
@@ -121,13 +123,19 @@ def package_path(self) -> str:
                 else:
                     return file
 
-        raise exceptions.InvalidPackage(self.package_name)
+        return None
 
-    def path(self) -> str:
-        return os.path.join(self.site_root, self.package_path())
+    def path(self) -> Union[str, None]:
+        excepted_package_path: Union[str, None] = self.package_path()
+        if excepted_package_path is None:
+            return None
+        return os.path.join(self.site_root, excepted_package_path)
 
-    def command_line_argument(self) -> str:
-        return self.site_root + "$" + self.package_path()
+    def command_line_argument(self) -> Union[str, None]:
+        excepted_package_path: Union[str, None] = self.package_path()
+        if excepted_package_path is None:
+            return None
+        return self.site_root + "$" + excepted_package_path
 
 
 class RawElement(abc.ABC):
@@ -270,7 +278,10 @@ def process_raw_elements(
     elements: List[Element] = []
 
     def add_if_exists(element: Element) -> bool:
-        if os.path.exists(element.path()):
+        excepted_path = element.path()
+        if excepted_path is None:
+            return False
+        if os.path.exists(excepted_path):
             elements.append(element)
             return True
         return False
diff --git a/client/configuration/tests/search_path_test.py b/client/configuration/tests/search_path_test.py
index 3104721c7d9..334975f46b7 100644
--- a/client/configuration/tests/search_path_test.py
+++ b/client/configuration/tests/search_path_test.py
@@ -71,9 +71,15 @@ def test_create_raw_element(self) -> None:
             )
 
     def test_path(self) -> None:
-        self.assertEqual(SimpleElement("foo").path(), "foo")
-        self.assertEqual(SubdirectoryElement("foo", "bar").path(), "foo/bar")
-        self.assertEqual(SitePackageElement("foo", "bar").path(), "foo/bar")
+        Path.mkdir(Path("foo"))
+        Path.mkdir(Path("foo/bar"))
+
+        try:
+            self.assertEqual(SimpleElement("foo").path(), "foo")
+            self.assertEqual(SubdirectoryElement("foo", "bar").path(), "foo/bar")
+            self.assertEqual(SitePackageElement("foo", "bar").path(), "foo/bar")
+        finally:
+            shutil.rmtree("foo")
 
     def test_command_line_argument(self) -> None:
         self.assertEqual(SimpleElement("foo").command_line_argument(), "foo")