diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 50ad5bc32506..a93996c4edad 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12664,6 +12664,14 @@ self: super: with self; {
 
   plotpy = callPackage ../development/python-modules/plotpy { };
 
+  # Plover 5 moves from PyQt5 to PySide6,
+  # which is a backward-incompatible change to praphical plugins.
+  # Use Plover 4 for now (2026-04-26),
+  # as the upstream still warns about this in every Plover 5 release,
+  # List of unsupported plugins:
+  # https://github.com/opensteno/plover_plugins_registry/blob/master/unsupported.json
+  plover = plover_4;
+
   plover-stroke = callPackage ../development/python-modules/plover-stroke { };
 
   plover_4 = callPackage ../development/python-modules/plover/4.nix {