--- libsass-3.4.6/src/units.hpp.orig    2017-10-11 13:24:25.000000000 +0000
+++ libsass-3.4.6/src/units.hpp 2017-10-29 14:18:55.273674291 +0000
@@ -5,6 +5,10 @@
 #include <string>
 #include <sstream>
 
+#ifdef __sun
+#undef SEC
+#endif
+
 namespace Sass {
 
   const double PI = std::acos(-1);