escape instead of setting the env var

cmake/AwsPrebuildDependency.cmake

@@ -25,10 +25,14 @@ function(aws_prebuild_dependency)
     set(depInstallDir ${depBinaryDir}/install)
     file(MAKE_DIRECTORY ${depBinaryDir})
 
+    # Conver the prefix path from list to escaped string to be passed as value used by
+    # `-DCMAKE_PREFIX_PATH` for the subprecoess
+    string(REPLACE ";" "\\\\;" ESCAPDED_PREFIX_PATH "${CMAKE_PREFIX_PATH}")
     # For execute_process to accept a dynamically constructed command, it should be passed in a list format.
     set(cmakeCommand "${CMAKE_COMMAND}")
     list(APPEND cmakeCommand -S ${AWS_PREBUILD_SOURCE_DIR})
     list(APPEND cmakeCommand -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE})
+    list(APPEND cmakeCommand -DCMAKE_PREFIX_PATH=${ESCAPDED_PREFIX_PATH})
     list(APPEND cmakeCommand -DCMAKE_INSTALL_PREFIX=${depInstallDir})
     list(APPEND cmakeCommand -DCMAKE_INSTALL_RPATH=${CMAKE_INSTALL_RPATH})
     list(APPEND cmakeCommand -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS})
@@ -38,15 +42,6 @@ function(aws_prebuild_dependency)
         list(APPEND cmakeCommand ${AWS_PREBUILD_CMAKE_ARGUMENTS})
     endif()
 
-    # Set cmake prefix path via envrionment variable incase it's already a list.
-    # Some version of cmake will treat the values in the list as separate args.
-    if(WIN32)
-        list(JOIN CMAKE_PREFIX_PATH ";" PREFIX_PATH_ENV_VAR)
-    else()
-        list(JOIN CMAKE_PREFIX_PATH ":" PREFIX_PATH_ENV_VAR)
-    endif()
-    set(ENV{CMAKE_PREFIX_PATH} ${PREFIX_PATH_ENV_VAR})
-
     # Configure dependency project.
     execute_process(
         COMMAND ${cmakeCommand}