home-assistant: update python-slugify override

pkgs/servers/home-assistant/default.nix

@@ -29,7 +29,6 @@
 let
   defaultOverrides = [
     # Override the version of some packages pinned in Home Assistant's setup.py and requirements_all.txt
-    (mkOverride "python-slugify" "4.0.1" "sha256-aaUXdm4AwSaOW7/A0BCgqFCN4LGNMK1aH/NX+K5yQnA=")
 
     # pytest-aiohttp>0.3.0 breaks home-assistant tests
     (self: super: {
@@ -101,6 +100,17 @@ let
       });
     })
 
+    (self: super: {
+      python-slugify = super.python-slugify.overridePythonAttrs (oldAttrs: rec {
+        pname = "python-slugify";
+        version = "4.0.1";
+        src = super.fetchPypi {
+          inherit pname version;
+          hash = "sha256-aaUXdm4AwSaOW7/A0BCgqFCN4LGNMK1aH/NX+K5yQnA=";
+        };
+      });
+    })
+
     # Pinned due to API changes in 0.4.0
     (self: super: {
       vilfo-api-client = super.vilfo-api-client.overridePythonAttrs (oldAttrs: rec {