--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,9 +98,13 @@ set(PYTHON_CMD "python")
 # CMAKE_MODULE_PATH is a CMAKE variable. It contains a list of paths
 # which could be used to search CMAKE modules by "include()" or "find_package()", but the default value is empty.
 # Add ${CMAKE_INSTALL_LIBDIR}/cmake and ${CMAKE_PREFIX_PATH}/lib/cmake to search list
+if (DEFINED ENV{CMAKE_PREFIX_PATH})
+    set(CMAKE_PREFIX_PATH $ENV{CMAKE_PREFIX_PATH})
+endif()
+
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
-set(AWS_MODULE_DIR "/${CMAKE_INSTALL_LIBDIR}/cmake")
-string(REPLACE ";" "${AWS_MODULE_DIR};" AWS_MODULE_PATH "${CMAKE_PREFIX_PATH}${AWS_MODULE_DIR}")
+set(AWS_MODULE_DIR "${CMAKE_INSTALL_LIBDIR}/cmake")
+string(REPLACE ":" "${AWS_MODULE_DIR};" AWS_MODULE_PATH "${CMAKE_PREFIX_PATH}${AWS_MODULE_DIR}")
 list(APPEND CMAKE_MODULE_PATH ${AWS_MODULE_PATH})
 
 # include() will "load and run" cmake script