diff --git a/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake b/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
--- a/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
+++ b/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
@@ -18,7 +18,7 @@
   if(NOT DARWIN_PREFER_PUBLIC_SDK)
     # Let's first try the internal SDK, otherwise use the public SDK.
     execute_process(
-      COMMAND xcodebuild -version -sdk ${sdk_name}.internal Path
+      COMMAND xcrun --sdk ${sdk_name}.internal --show-sdk-path
       RESULT_VARIABLE result_process
       OUTPUT_VARIABLE var_internal
       OUTPUT_STRIP_TRAILING_WHITESPACE
@@ -27,7 +27,7 @@
   endif()
   if((NOT result_process EQUAL 0) OR "" STREQUAL "${var_internal}")
     execute_process(
-      COMMAND xcodebuild -version -sdk ${sdk_name} Path
+      COMMAND xcrun --sdk ${sdk_name} --show-sdk-path
       RESULT_VARIABLE result_process
       OUTPUT_VARIABLE var_internal
       OUTPUT_STRIP_TRAILING_WHITESPACE
@@ -39,6 +39,7 @@
   if(result_process EQUAL 0)
     set(${var} ${var_internal} PARENT_SCOPE)
   endif()
+  message(STATUS "Checking DARWIN_${sdk_name}_SYSROOT - '${var_internal}'")
   set(DARWIN_${sdk_name}_CACHED_SYSROOT ${var_internal} CACHE STRING "Darwin SDK path for SDK ${sdk_name}." FORCE)
 endfunction()
 
diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -316,6 +316,7 @@
   find_darwin_sdk_dir(DARWIN_tvos_SYSROOT appletvos)
 
   if(NOT DARWIN_osx_SYSROOT)
+    message(WARNING "Could not determine OS X sysroot, trying /usr/include")
     if(EXISTS /usr/include)
       set(DARWIN_osx_SYSROOT /)
     else()