diff --git a/setup.py b/setup.py
index 44e0ebabd..cdef250b7 100644
--- a/setup.py
+++ b/setup.py
@@ -56,6 +56,8 @@ def get_c_extension():
         except FileNotFoundError:
             brew_prefix = None
 
+        raise Exception("AAAAAAAAAAAA Darwin build, CC=", os.environ.get("CC"))
+
         if brew_prefix and not os.environ.get('CC'):
             os.environ['CC'] = '{}/opt/llvm/bin/clang'.format(brew_prefix)
             link_args = ['-L{}/opt/llvm/lib'.format(brew_prefix), '-fopenmp']