flake: fix docs

flake.nix

@@ -76,6 +76,15 @@
                   src = inputs.hydra;
                   buildInputs = o.buildInputs ++ [ final.perlPackages.DBIxClassHelpers ];
                 });
+                python3 = prev.python3.override {
+                  packageOverrides = _: super: {
+                    pymdown-extensions = super.pymdown-extensions.overridePythonAttrs (o: {
+                      disabledTests = o.disabledTests ++ [
+                        "test_windows_root_conversion"
+                      ];
+                    });
+                  };
+                };
               })
             ];
           };