Use Logger::stdout()

(cherry picked from commit 8f41847394)

src/nix/eval.cc

@@ -55,16 +55,15 @@ struct CmdEval : MixJSON, InstallableCommand
         auto v = installable->toValue(*state).first;
         PathSet context;
 
-        stopProgressBar();
-
         if (raw) {
+            stopProgressBar();
             std::cout << state->coerceToString(noPos, *v, context);
         } else if (json) {
             JSONPlaceholder jsonOut(std::cout);
             printValueAsJSON(*state, true, *v, jsonOut, context);
         } else {
             state->forceValueDeep(*v);
-            std::cout << *v << "\n";
+            logger->stdout("%s", *v);
         }
     }
 };