https://github.com/boostorg/process/commit/e08374ed95ac33865bda40602c94909e7cd9607f.patch
https://bugs.gentoo.org/827899

From: Eddie-cz <48474051+Eddie-cz@users.noreply.github.com>
Date: Mon, 2 Aug 2021 10:49:42 +0200
Subject: [PATCH] Update wchar_t.hpp

--- a/boost/process/detail/traits/wchar_t.hpp
+++ b/boost/process/detail/traits/wchar_t.hpp
@@ -12,6 +12,8 @@
 #include <boost/process/detail/traits/env.hpp>
 #include <boost/process/locale.hpp>
 
+#include <algorithm>
+
 namespace boost { namespace process { namespace detail {
 
 //template