diff --git a/libunwind/CMakeLists.txt b/libunwind/CMakeLists.txt
--- a/libunwind/CMakeLists.txt
+++ b/libunwind/CMakeLists.txt
@@ -139,6 +139,8 @@
 
 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
   set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})
+  set(LIBUNWIND_INSTALL_INCLUDE_DIR "include/${LLVM_DEFAULT_TARGET_TRIPLE}" CACHE PATH
+      "Path where built libunwind headers should be installed.")
   set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH
       "Path where built libunwind libraries should be installed.")
   set(LIBUNWIND_INSTALL_RUNTIME_DIR bin CACHE PATH
@@ -147,14 +149,14 @@
     string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
     string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
   endif()
-elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
-  set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
-  set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX} CACHE PATH
-      "Path where built libunwind libraries should be installed.")
-  set(LIBUNWIND_INSTALL_RUNTIME_DIR bin CACHE PATH
-      "Path where built libunwind runtime libraries should be installed.")
 else()
-  set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
+  if(LLVM_LIBRARY_OUTPUT_INTDIR)
+    set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+  else()
+    set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
+  endif()
+  set(LIBUNWIND_INSTALL_INCLUDE_DIR include CACHE PATH
+      "Path where built libunwind headers should be installed.")
   set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX} CACHE PATH
       "Path where built libunwind libraries should be installed.")
   set(LIBUNWIND_INSTALL_RUNTIME_DIR bin CACHE PATH
diff --git a/libunwind/include/CMakeLists.txt b/libunwind/include/CMakeLists.txt
--- a/libunwind/include/CMakeLists.txt
+++ b/libunwind/include/CMakeLists.txt
@@ -14,7 +14,7 @@
   foreach(file ${files})
     get_filename_component(dir ${file} DIRECTORY)
     install(FILES ${file}
-      DESTINATION "include/${dir}"
+      DESTINATION "${LIBUNWIND_INSTALL_INCLUDE_DIR}/${dir}"
       COMPONENT unwind-headers
       PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
     )