diff -rupN --no-dereference geos-3.9.1/CMakeLists.txt geos-3.9.1-new/CMakeLists.txt
--- geos-3.9.1/CMakeLists.txt	2021-02-10 19:10:27.000000000 +0100
+++ geos-3.9.1-new/CMakeLists.txt	2021-02-11 15:26:25.358373951 +0100
@@ -308,16 +308,16 @@ configure_file(cmake/geos-config.cmake
 
 install(TARGETS geos geos_cxx_flags
   EXPORT geos-targets
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib
+  LIBRARY DESTINATION lib${LIB_SUFFIX}
+  ARCHIVE DESTINATION lib${LIB_SUFFIX}
   RUNTIME DESTINATION bin
   INCLUDES DESTINATION include
   )
 
 install(TARGETS geos_c
   EXPORT geos-targets
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib
+  LIBRARY DESTINATION lib${LIB_SUFFIX}
+  ARCHIVE DESTINATION lib${LIB_SUFFIX}
   RUNTIME DESTINATION bin
   INCLUDES DESTINATION include
   )
@@ -325,12 +325,12 @@ install(TARGETS geos_c
 install(EXPORT geos-targets
   FILE geos-targets.cmake
   NAMESPACE GEOS::
-  DESTINATION lib/cmake/GEOS)
+  DESTINATION lib${LIB_SUFFIX}/cmake/GEOS)
 
 install(FILES
   "${CMAKE_CURRENT_BINARY_DIR}/geos-config.cmake"
   "${CMAKE_CURRENT_BINARY_DIR}/geos-config-version.cmake"
-  DESTINATION lib/cmake/GEOS)
+  DESTINATION lib${LIB_SUFFIX}/cmake/GEOS)
 install(DIRECTORY
   "${CMAKE_CURRENT_LIST_DIR}/include/geos"
   "${CMAKE_CURRENT_BINARY_DIR}/include/geos"
diff -rupN --no-dereference geos-3.9.1/tools/CMakeLists.txt geos-3.9.1-new/tools/CMakeLists.txt
--- geos-3.9.1/tools/CMakeLists.txt	2021-02-10 19:10:27.000000000 +0100
+++ geos-3.9.1-new/tools/CMakeLists.txt	2021-02-11 15:26:25.358373951 +0100
@@ -36,7 +36,7 @@ if(NOT MSVC)
 
   install(FILES
     ${CMAKE_CURRENT_BINARY_DIR}/geos.pc
-    DESTINATION lib/pkgconfig)
+    DESTINATION lib${LIB_SUFFIX}/pkgconfig)
 
 endif()
 
diff -rupN --no-dereference geos-3.9.1/tools/geos-config.cmake geos-3.9.1-new/tools/geos-config.cmake
--- geos-3.9.1/tools/geos-config.cmake	2021-02-04 00:19:53.000000000 +0100
+++ geos-3.9.1-new/tools/geos-config.cmake	2021-02-11 15:26:25.359373949 +0100
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 prefix=@ESCAPED_INSTALL_PREFIX@
-libdir=${prefix}/lib
+libdir=${prefix}/lib@LIB_SUFFIX
 
 usage()
 {