diff --git a/llvm/cmake/modules/LLVMInstallSymlink.cmake
 b/llvm/cmake/modules/LLVMInstallSymlink.cmake
--- a/llvm/cmake/modules/LLVMInstallSymlink.cmake
+++ b/llvm/cmake/modules/LLVMInstallSymlink.cmake
@@ -3,19 +3,17 @@
 # See PR8397.
 
 function(install_symlink name target outdir)
-  set(DESTDIR $ENV{DESTDIR})
-  if(CMAKE_HOST_UNIX)
-    set(LINK_OR_COPY create_symlink)
-  else()
-    set(LINK_OR_COPY copy)
-  endif()
-
   set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}/")
 
   message(STATUS "Creating ${name}")
 
   execute_process(
-    COMMAND "${CMAKE_COMMAND}" -E ${LINK_OR_COPY} "${target}" "${name}"
-    WORKING_DIRECTORY "${bindir}")
+    COMMAND "${CMAKE_COMMAND}" -E create_symlink "${target}" "${name}"
+    WORKING_DIRECTORY "${bindir}" ERROR_VARIABLE has_err)
+  if(CMAKE_HOST_WIN32 AND has_err)
+    execute_process(
+      COMMAND "${CMAKE_COMMAND}" -E copy "${target}" "${name}"
+      WORKING_DIRECTORY "${bindir}")
+  endif()
 
 endfunction()