Use nowide from Boost. From Fedora.

Index: util/CMakeLists.txt
--- util/CMakeLists.txt.orig
+++ util/CMakeLists.txt
@@ -1,9 +1,7 @@
-find_package(Boost 1.54 REQUIRED date_time chrono system)
+find_package(Boost 1.73 REQUIRED date_time chrono system nowide)
 
 add_leatherman_deps(${Boost_LIBRARIES})
 add_leatherman_includes("${Boost_INCLUDE_DIRS}")
-
-leatherman_dependency(nowide)
 
 if(WIN32)
     set(PLATFORM_SRCS "src/windows/time.cc" "src/windows/environment.cc" "src/windows/scoped_handle.cc")
