https://bugs.gentoo.org/671768

--- a/src/cc/progressbar.h
+++ b/src/cc/progressbar.h
@@ -316,7 +316,7 @@ private:
 
   static inline std::string eta_from_seconds(const double s)
   {
-    const pt::time_duration& td = pt::seconds(s);
+    const pt::time_duration& td = pt::seconds(long(s));
     return pt::to_simple_string(td);
   }