diff -bu ./Makefile.PL~ ./Makefile.PL
--- ./Makefile.PL~	2017-05-11 18:21:42.000000000 +0300
+++ ./Makefile.PL	2017-08-04 10:11:50.000000000 +0300
@@ -24,6 +24,7 @@
   "LICENSE" => "perl",
   "MIN_PERL_VERSION" => "5.006",
   "NAME" => "Mac::SystemDirectory",
+  "CC" => "/usr/bin/cc",
   "PREREQ_PM" => {
     "Exporter" => 0,
     "XSLoader" => 0,