diff --git a/packages/interpreter/build.rs b/packages/interpreter/build.rs
index f3cf0b7de..753e774e1 100644
--- a/packages/interpreter/build.rs
+++ b/packages/interpreter/build.rs
@@ -16,6 +16,8 @@ fn main() {
         if contents.trim() == hash.to_string() {
             return;
         }
+
+        panic!("Hashes don't match {} != {}", contents, hash.to_string());
     }
 
     // Otherwise, generate the bindings and write the new hash to disk