diff --git a/pkgs/applications/misc/octoprint/default.nix b/pkgs/applications/misc/octoprint/default.nix
index c1a4f6aec92..4c740852f6a 100644
--- a/pkgs/applications/misc/octoprint/default.nix
+++ b/pkgs/applications/misc/octoprint/default.nix
@@ -38,6 +38,17 @@ let
               nativeBuildInputs = [ ];
               format = "setuptools";
               outputs = [ "out" ];
+              patches = [ ];
+            });
+            # downgrade needed for flask-babel 2.0.0
+            babel = super.babel.overridePythonAttrs (oldAttrs: rec {
+              version = "2.11.0";
+              src = super.fetchPypi {
+                pname = "Babel";
+                inherit version;
+                hash = "sha256-XvSzImsBgN7d7UIpZRyLDho6aig31FoHMnLzE+TPl/Y=";
+              };
+              propagatedBuildInputs = [ self.pytz ];
             });
           }
         )