diff --git a/flake.nix b/flake.nix
index 3a38c08..50616a9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,9 +34,9 @@
             ipython
             
             # Add more default packages as needed
-            sphinx.override { 
-              preferWheel = true;  # Try to use pre-built wheels which may have better compatibility
-            }
+            sphinx.overridePythonAttrs (old: {
+              version = "7.2.6";  # Example - use a version compatible with Python 3.10
+            })          
           ];
           
           # Combine base packages with extra packages