diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -2006,7 +2006,7 @@
 
   set(output_dir lib${LLVM_LIBDIR_SUFFIX})
   if(WIN32 AND "${type}" STREQUAL "SHARED")
-    set(output_dir bin)
+    set(output_dir "${CMAKE_INSTALL_LIBDIR}")
   endif()
 
   install(SCRIPT ${INSTALL_SYMLINK}
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
@@ -2,21 +2,22 @@
 # DESTDIR environment variable may be unset at configuration time.
 # See PR8397.
 
-include(GNUInstallDirs)
+include(ExtendPath)
 
 function(install_symlink name target outdir)
   set(DESTDIR $ENV{DESTDIR})
-  set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}")
+  extend_path(outdir_abs "${CMAKE_INSTALL_PREFIX}" "${outdir}")
+  set(outdir_abs "${DESTDIR}${outdir_abs}")
 
   message(STATUS "Creating ${name}")
 
   execute_process(
     COMMAND "${CMAKE_COMMAND}" -E create_symlink "${target}" "${name}"
-    WORKING_DIRECTORY "${bindir}" ERROR_VARIABLE has_err)
+    WORKING_DIRECTORY "${outdir_abs}" ERROR_VARIABLE has_err)
   if(CMAKE_HOST_WIN32 AND has_err)
     execute_process(
       COMMAND "${CMAKE_COMMAND}" -E copy "${target}" "${name}"
-      WORKING_DIRECTORY "${bindir}")
+      WORKING_DIRECTORY "${outdir_abs}")
   endif()
 
 endfunction()