[LyX/2.4.x] Use Qt6 for building last 2.4.x version

[Richard Kimberly Heck]

commit 5d4bf9893769501e6af0c9e13f1e8e9c2ccf8e5f
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Fri Feb 13 15:19:15 2026 -0500

    Use Qt6 for building last 2.4.x version
---
 development/tools/lyx-build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/development/tools/lyx-build b/development/tools/lyx-build
index f4ff053362..af6af20b8b 100755
--- a/development/tools/lyx-build
+++ b/development/tools/lyx-build
@@ -80,7 +80,7 @@ $DEBUG mkdir $BASE/lyx-build/
 $DEBUG cd $BASE/lyx-build/
 
 echo "Building distribution...";
-$DEBUG $BASE/lyx-export/configure --enable-build-type=rel --enable-qt5
+$DEBUG $BASE/lyx-export/configure --enable-build-type=rel --enable-qt6
 if ! $DEBUG make dist; then
   echo "Couldn't make distribution!";
   exit 1;
@@ -118,7 +118,7 @@ if [ -n "$COMPILE" ]; then
 		exit 1;
 	fi
 
-	$DEBUG ./configure --enable-build-type=rel --enable-qt5
+	$DEBUG ./configure --enable-build-type=rel --enable-qt6
 
 	if $DEBUG make $MAKEOPTS; then
 		echo "Compilation complete.";