diff --git a/build/cmake/lib/xml/CMakeLists.txt b/build/cmake/lib/xml/CMakeLists.txt
index 718f5f64ad..4dfc9e4cc2 100644
--- a/build/cmake/lib/xml/CMakeLists.txt
+++ b/build/cmake/lib/xml/CMakeLists.txt
@@ -9,45 +9,14 @@
 
 include(../../source_groups.cmake)
 
-if(WIN32)
-    set(EXPAT_POSTFIX $<$<CONFIG:Debug>:d>)
-endif(WIN32)
-
 if(wxUSE_EXPAT STREQUAL "builtin")
-    ExternalProject_Add(wxexpat
-        DOWNLOAD_COMMAND ""
-        SOURCE_DIR ${wxSOURCE_DIR}/src/expat/expat
-        CMAKE_ARGS
-            -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
-            -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-            -DBUILD_tools=OFF
-            -DBUILD_examples=OFF
-            -DBUILD_tests=OFF
-            -DBUILD_shared=OFF
-        INSTALL_COMMAND
-            ${CMAKE_COMMAND} --build <BINARY_DIR> --config $<CONFIGURATION> --target install
-        COMMAND
-            ${CMAKE_COMMAND} -E make_directory <INSTALL_DIR>/wxlib
-        COMMAND
-            ${CMAKE_COMMAND} -E rename
-                <INSTALL_DIR>/lib/${CMAKE_STATIC_LIBRARY_PREFIX}expat${EXPAT_POSTFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}
-                <INSTALL_DIR>/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat$<$<CONFIG:Debug>:d>${CMAKE_STATIC_LIBRARY_SUFFIX}
-        )
-    ExternalProject_Get_Property(wxexpat INSTALL_DIR)
-    add_library(expat STATIC IMPORTED)
-    set_target_properties(expat PROPERTIES
-        IMPORTED_LOCATION "${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat${CMAKE_STATIC_LIBRARY_SUFFIX}"
-        IMPORTED_LOCATION_DEBUG "${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpatd${CMAKE_STATIC_LIBRARY_SUFFIX}"
-        FOLDER "Third Party Libraries"
-        )
-    add_dependencies(expat wxexpat)
-    set(EXPAT_INCLUDE_DIRS "${INSTALL_DIR}/include")
-    set(EXPAT_LIBRARIES expat)
-    if(NOT wxBUILD_SHARED)
-        wx_install(
-            FILES ${INSTALL_DIR}/wxlib/${CMAKE_STATIC_LIBRARY_PREFIX}wxexpat$<$<CONFIG:Debug>:d>${CMAKE_STATIC_LIBRARY_SUFFIX}
-            DESTINATION "lib${wxPLATFORM_LIB_DIR}")
-    endif()
+    wx_add_builtin_library(wxexpat
+        src/expat/expat/lib/xmlparse.c
+        src/expat/expat/lib/xmlrole.c
+        src/expat/expat/lib/xmltok.c
+    )
+    set(EXPAT_LIBRARIES wxexpat)
+    set(EXPAT_INCLUDE_DIRS ${wxSOURCE_DIR}/src/expat/expat/lib)
 elseif(wxUSE_EXPAT)
     find_package(EXPAT)
 endif()