nixpkgs/pkgs/development/libraries/kde-frameworks/kiconthemes/default-theme-breeze.patch

Index: kiconthemes-5.17.0/src/kicontheme.cpp
===================================================================
--- kiconthemes-5.17.0.orig/src/kicontheme.cpp
+++ kiconthemes-5.17.0/src/kicontheme.cpp
@@ -557,7 +557,7 @@ void KIconTheme::reconfigure()
 // static
 QString KIconTheme::defaultThemeName()
 {
-    return QStringLiteral("hicolor");
+    return QStringLiteral("breeze");
 }
 
 void KIconTheme::assignIconsToContextMenu(ContextMenus type,