diff --git a/build/cmake/select_filesystem.cmake b/build/cmake/select_filesystem.cmake
index 10c9836f..7b2163de 100644
--- a/build/cmake/select_filesystem.cmake
+++ b/build/cmake/select_filesystem.cmake
@@ -1,11 +1,12 @@
-# The ISO C++ File System Technical Specification (ISO-TS, or STD) is optional.
+# The ISO C++ File System Technical Specification (ISO-TS, or STD) was optional.
 #              http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4100.pdf
-# This is not a workaround, but an user option.
-# The library maybe available in the std library in use or from Boost (almost compatible)
+# It is part of c++17.
+# The library may be not available or working correctly in the std library in use. As a workaround we may try
+# to "implement" it (ab)using Boost (almost compatible)
 #              http://www.boost.org/doc/libs/1_60_0/libs/filesystem/doc/index.htm
 # or you can choose to use the (partial, but functional) implementation provided by nana.
 # If you include the file <nana/filesystem/filesystem.hpp> or <nana/filesystem/filesystem_ext.hpp>
-# the selected option will be set by nana into std::experimental::filesystem
+# the selected option will be set by nana into std::filesystem
 # By default Nana will try to use the STD. If STD is not available and NANA_CMAKE_FIND_BOOST_FILESYSTEM
 # is set to ON nana will try to use boost if available. Nana own implementation will be use if none of
 # the previus were selected or available.