diff --git a/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix b/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
index 20fa793a8a63..346f7de2b898 100644
--- a/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
@@ -23,5 +23,11 @@ buildPythonPackage rec {
     description = "SQLAlchemy backend for Telethon session storage";
     license = licenses.mit;
     maintainers = with maintainers; [ nyanloutre ];
+
+    # Package requires SQLAlchemy <2
+    # https://github.com/tulir/telethon-session-sqlalchemy/blob/d498503ddde332e190bfa47e70f0bfa59fe6b5ef/setup.py#L17
+    # Repo is archived and so this is unlikely to change unless someone forks
+    # and takes over development
+    broken = versionAtLeast sqlalchemy.version "2";
   };
 }