diff --git a/dub.json b/dub.json
index 4b354bb..f0a110b 100644
--- a/dub.json
+++ b/dub.json
@@ -15,6 +15,6 @@
         "built_with_dub"
     ],
     "preGenerateCommands" : [
-      "rdmd $PACKAGE_DIR/dubhash.d"
+      "rdmd \"$PACKAGE_DIR/dubhash.d\""
     ]
 }