diff --git a/.packer.yml b/.packer.yml
index 1d9d7b16517bf347f1eab94934e09b7820a9ee83..8ef58dac29a5ac3db2857bfc2839af4a60350123 100644
--- a/.packer.yml
+++ b/.packer.yml
@@ -42,7 +42,7 @@ osx:
         - mkdir build
         - cd build
         - export CMAKE_PREFIX_PATH=/usr/local/Cellar/qt5/5.4.0
-        - cmake ../ -DCMAKE_INSTALL_PREFIX=%(prefix_path)s
+        - cmake ../ -DCMAKE_INSTALL_PREFIX=%(prefix_path)s -DRING_VERSION=$(date "+%%Y%%m%%d")
         - make install -j1
         - cpack -G DragNDrop Ring
     transfer: