error[E0432]: unresolved import `std::cmp::Reverse`
  --> src/ls/ls.rs:34:5
   |
34 | use std::cmp::Reverse;
   |     ^^^^^^^^^^^^^^^^^ no `Reverse` in `cmp`

error: aborting due to previous error

error: Could not compile `ls`.
Build failed, waiting for other jobs to finish...
error: build failed
make: *** [build-uutils] Error 101