diff --git a/pkgs/applications/misc/octoprint/default.nix b/pkgs/applications/misc/octoprint/default.nix
index 4756ab5b0af8..098ebc47ac2f 100644
--- a/pkgs/applications/misc/octoprint/default.nix
+++ b/pkgs/applications/misc/octoprint/default.nix
@@ -168,6 +168,7 @@ let
                     "zeroconf"
                     "Flask-Login"
                     "werkzeug"
+                    "flask"
                   ];
                 in
                 ''