diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd7c4f8..e4e92c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2050,7 +2050,9 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/ncdap_test/pingurl.c ${CMAKE_CURRENT_
 # Create CMake package configuration files. With these, other packages using
 # cmake should be able to find netcdf using find_package and find_library.
 # The EXPORT call is paired with one in liblib.
-set(ConfigPackageLocation ${CMAKE_INSTALL_LIBDIR}/cmake/netCDF)
+if(NOT DEFINED ConfigPackageLocation)
+  set(ConfigPackageLocation ${CMAKE_INSTALL_LIBDIR}/cmake/netCDF)
+endif(NOT DEFINED ConfigPackageLocation)
 
 install(EXPORT netCDFTargets
   DESTINATION ${ConfigPackageLocation}