Almost there

Tools/Gulp/tasks/gulpTasks-libraries.js

@@ -108,7 +108,7 @@ var buildAMDDTSFiles = function(libraries, settings, cb) {
 var appendLoseDTSFiles = function(settings) {
     if (settings.build.loseDTSFiles) {
         return gulp.src([tempTypingsFile, path.join(settings.computed.srcDirectory, settings.build.loseDTSFiles)])
-            .pipe(concat("toto.txt"))
+            .pipe(concat(tempTypingsFileName))
             .pipe(gulp.dest(config.computed.tempFolder));
     }
     return Promise.resolve();