diff --git a/doc/languages-frameworks/python.section.md b/doc/languages-frameworks/python.section.md
index 77828110cc4f..e0127bd3d47d 100644
--- a/doc/languages-frameworks/python.section.md
+++ b/doc/languages-frameworks/python.section.md
@@ -411,7 +411,7 @@ let
     };
   };
 
-  pythonEnv =  testPython.withPackages (ps: [ ps.my-editable ]);
+  pythonEnv =  myPython.withPackages (ps: [ ps.my-editable ]);
 
 in pkgs.mkShell {
   packages = [ pythonEnv ];