trying

flake.nix

@@ -21,14 +21,24 @@
           # Select Python version based on the parameter
           python = pkgs.${pythonVersion};
           
-          handlePackageCompatibility = pythonPackages: 
-            let
-              fixSphinx = ps: 
-                if ps ? sphinx 
-                then ps.sphinx.overridePythonAttrs (old: { version = "7.2.6"; })
-                else ps.sphinx;
-            in
-              pythonPackages;
+          # Define package overrides for specific Python versions
+          packageOverrides = self: super: {
+            # Fix Sphinx for Python 3.10
+            sphinx = if pythonVersion == "python310" then
+              super.sphinx.overridePythonAttrs (old: { 
+                version = "7.2.6";  # Use a version known to work with Python 3.10
+                doCheck = false;    # Skip tests to avoid compatibility issues
+              })
+            else
+              super.sphinx;
+            
+            # Add more package overrides as needed
+          };
+          
+          # Create Python with package overrides
+          pythonWithOverrides = python.override {
+            packageOverrides = packageOverrides;
+          };
 
           # Base Python packages that are always included
           basePackages = ps: with ps; [
@@ -48,15 +58,16 @@
           # Combine base packages with extra packages
           allPackages = ps: (basePackages ps) ++ (extraPackages ps);
 
-          # Create the Python environment
-          pythonEnv = python.withPackages allPackages;
+          # Create the Python environment using the Python with overrides
+          pythonEnv = pythonWithOverrides.withPackages allPackages;
         in
           {
             # The Python environment
             package = pythonEnv;
 
             # Make the chosen Python version accessible
-            inherit python pythonVersion;
+            python = pythonWithOverrides;
+            inherit pythonVersion;
 
             # Development shell with the Python environment
             devShell = pkgs.mkShell {
@@ -65,7 +76,7 @@
               ] ++ extraSystemPackages;
 
               shellHook = ''
-                echo "Python $(${python}/bin/python --version)"
+                echo "Python $(${pythonWithOverrides}/bin/python --version)"
                 echo "Custom Python environment activated!"
               '';
             };