diff --git a/pkgs/development/python-modules/datamodel-code-generator/default.nix b/pkgs/development/python-modules/datamodel-code-generator/default.nix
index e542fbc0acbb..7e4cee264425 100644
--- a/pkgs/development/python-modules/datamodel-code-generator/default.nix
+++ b/pkgs/development/python-modules/datamodel-code-generator/default.nix
@@ -116,6 +116,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/koxudaxi/datamodel-code-generator/releases/tag/${src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ tochiaha ];
-    mainProgram = "datamodel-code-generator";
+    mainProgram = "datamodel-codegen";
   };
 }