--- a/app/app.pro    
+++ b/app/app.pro
@@ -208,8 +208,8 @@

 GIT {
     DEFINES += GIT_EXISTS \
-    "GIT_CURRENT_SHA1=$$system(git --git-dir=.git --work-tree=. -C $$_PRO_FILE_PWD_/../ rev-parse HEAD)" \
-    "GIT_TIMESTAMP=$$system(git --git-dir=.git --work-tree=. -C $$_PRO_FILE_PWD_/../ log -n 1 --pretty=format:"%cd" --date=format:"%Y-%m-%d_%H:%M:%S")"
+    "GIT_CURRENT_SHA1=$$cat($$_PRO_FILE_PWD_/../COMMIT)" \
+    "GIT_TIMESTAMP=$$cat($$_PRO_FILE_PWD_/../SOURCE_TIMESTAMP_EPOCH)"
 }

 macx {