Add temporary mitigation for Plasma pinentry issue

system/default.nix

@@ -13,6 +13,7 @@ in
     ./sessions
     ./testing
     ./cachix.nix
+    ./mitigations.nix
   ];
   config = {};
   options.nixfiles = {

system/mitigations.nix

@@ -0,0 +1,18 @@
+{ pkgs, config, lib, inputs, nixpkgs, ... }:
+let
+  p5 = config.services.xserver.desktopManager.plasma5.enable;
+  p6 = config.services.desktopManager.plasma6.enable;
+in
+{
+  config = lib.mkMerge [
+    (lib.mkIf (p5 || p6) {
+      assertions = [
+        {
+          assertion = ((nixpkgs == inputs.nixpkgs-unstable) && nixpkgs.lastModified < (1710889954 + (60*60*24*2)));
+          message = "workaround still configured in system/mitigations.nix";
+        }
+      ];
+      programs.gnupg.agent.pinentryPackage = lib.mkForce pkgs.pinentry-qt;
+    })
+  ];
+}