This is built when building Setuo, and after
54ad1b4cfb1c8302f1b862cb2699ab9351e3eb5b, such modules cannot import
Utility.Directory, because it depends on unix, which is not in
setup-depends. This module only needs System.Directory, so import
Utility.SystemDirectory instead.
Sponsored-by: Dartmouth College's Datalad project
#ifdef darwin_HOST_OS
import Utility.OSX
import Utility.Path
-import Utility.Directory
+import Utility.SystemDirectory
import Utility.FileSystemEncoding
#endif