diff -rupN libwebp-1.2.4/CMakeLists.txt libwebp-1.2.4-new/CMakeLists.txt
--- libwebp-1.2.4/CMakeLists.txt	2022-08-06 01:49:26.000000000 +0200
+++ libwebp-1.2.4-new/CMakeLists.txt	2022-09-22 12:56:18.542998584 +0200
@@ -112,7 +112,7 @@ endif()
 
 set(prefix ${CMAKE_INSTALL_PREFIX})
 set(exec_prefix "\$\{prefix\}")
-set(libdir "\$\{prefix\}/lib")
+set(libdir "\$\{prefix\}/lib${LIB_SUFFIX}")
 set(includedir "\$\{prefix\}/include")
 set(PTHREAD_LIBS ${CMAKE_THREAD_LIBS_INIT})
 set(INSTALLED_LIBRARIES)