diff --git a/desktop/package/package.gradle b/desktop/package/package.gradle
index 3474661a399..5a8ceac1482 100644
--- a/desktop/package/package.gradle
+++ b/desktop/package/package.gradle
@@ -195,7 +195,7 @@ task packageInstallers {
             from "${fatJarFolderPath}/${mainJarName}"
             into binariesFolderPath
             // desktop-1.6.4-SNAPSHOT-all.jar => desktop-1.6.4-SNAPSHOT-all-mac.jar (or -win.jar, or -linux.jar)
-            rename { String fileName -> fileName.replace('-all.jar', "-all-" + os + ".jar") }
+            rename { String fileName -> fileName.replace('-all.jar', "-all-" + Os + ".jar") }
         }
 
         // Checksum each file present in the binaries folder