diff --git a/flake.nix b/flake.nix
index ed2b09e..f243873 100644
--- a/flake.nix
+++ b/flake.nix
@@ -31,9 +31,7 @@
 
           # Custom function to filter out sphinx when Python version is < 3.11
           filterSphinxForOldPython = packages:
-            if isPython311OrHigher
-            then packages
-            else builtins.filter (p: p.pname or "" != "sphinx") packages;
+            builtins.filter (p: p.pname or "" != "sphinx") packages;
 
           # Base Python packages that are always included
           basePackages = ps: with ps; [