diff --color -Naur a/src/3rdparty/clip2tri/CMakeLists.txt b/src/3rdparty/clip2tri/CMakeLists.txt
--- a/src/3rdparty/clip2tri/CMakeLists.txt	2023-05-13 16:59:42.377052155 +0200
+++ b/src/3rdparty/clip2tri/CMakeLists.txt	2023-05-13 23:05:44.950379088 +0200
@@ -4,6 +4,7 @@
 ## Bundled_Clip2Tri Generic Library:
 #####################################################################
 
+find_package(poly2tri)
 qt_internal_add_3rdparty_library(Bundled_Clip2Tri
     QMAKE_LIB_NAME _clip2tri
     STATIC
@@ -13,11 +14,12 @@
         clip2tri.cpp clip2tri.h
     INCLUDE_DIRECTORIES
         ../clipper
-        ../poly2tri
     LIBRARIES
         Qt::Bundled_Clipper # special case
-        Qt::Bundled_Poly2Tri # special case
+        poly2tri::poly2tri
 )
+target_link_libraries(Bundled_Clip2Tri PRIVATE poly2tri::poly2tri)
+set_target_properties(poly2tri::poly2tri PROPERTIES INTERFACE_QT_PACKAGE_NAME poly2tri)
 qt_disable_warnings(Bundled_Clip2Tri)
 qt_set_symbol_visibility_hidden(Bundled_Clip2Tri)
 
diff --color -Naur a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt	2023-05-13 16:59:42.379052157 +0200
+++ b/src/CMakeLists.txt	2023-05-13 17:00:19.256085781 +0200
@@ -2,7 +2,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 # special case begin
-add_subdirectory(3rdparty/poly2tri)
 add_subdirectory(3rdparty/clipper)
 add_subdirectory(3rdparty/clip2tri)
 add_subdirectory(positioning)