From 37245a63b555a01579d0555710f4694886f0ca12 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Thu, 19 Mar 2026 13:18:00 -0400
Subject: [PATCH] uppaal: fix blank window on Wayland

---
 pkgs/by-name/up/uppaal/package.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/up/uppaal/package.nix b/pkgs/by-name/up/uppaal/package.nix
index a2ef8f764987..ad8f57da5c36 100644
--- a/pkgs/by-name/up/uppaal/package.nix
+++ b/pkgs/by-name/up/uppaal/package.nix
@@ -64,7 +64,8 @@ stdenvNoCC.mkDerivation rec {
     makeWrapper $out/lib/uppaal/uppaal $out/bin/uppaal \
       --set JAVA_HOME ${jdk17} \
       --set PATH $out/lib/uppaal:$PATH \
-      --prefix _JAVA_OPTIONS " " "-Dawt.useSystemAAFontSettings=gasp"
+      --prefix _JAVA_OPTIONS " " "-Dawt.useSystemAAFontSettings=gasp" \
+      --set _JAVA_AWT_WM_NONREPARENTING 1 # Java Swing renders a blank window on Wayland without this
 
     runHook postInstall
   '';