--- a/tools/build/src/tools/features/os-feature.jam	2018-08-01 15:50:55.000000000 -0500
+++ b/tools/build/src/tools/features/os-feature.jam	2019-03-10 00:02:45.701830454 -0600
@@ -34,7 +34,7 @@
     local host-os ;
     if [ os.name ] in $(.os-names:U)
     {
-        host-os = [ os.name ] ;
+        host-os = darwin ;
     }
     else
     {