diff --git a/autospec/tarball.py b/autospec/tarball.py
index 65d8d78..38092a2 100644
--- a/autospec/tarball.py
+++ b/autospec/tarball.py
@@ -446,5 +446,8 @@ class Content():
             autogenerated_src.extract(os.path.join(self.base_path, 'autogenerated-tmp'))
             # Move the autogenerated source to a non-version-named directory for consistent diffs
             call(f"mv autogenerated-tmp/{autogenerated_src.prefix} autogenerated", check=True, cwd=self.base_path)
-            call("diff -u -r ../autogenerated ./",
-                 logfile="archive.diff", check=False, cwd=os.path.join(self.base_path, main_src.prefix))
+            call("diff -u -r --unidirectional-new-file ../autogenerated ./",
+                 logfile="archive.diff.in", check=False, cwd=os.path.join(self.base_path, main_src.prefix))
+            call("grep -A14 -E '^(diff|Only in)' archive.diff.in",
+                 logfile="archive.diff", check=False, cwd=os.getcwd())
+            call("rm archive.diff.in", check=False, cwd=os.getcwd())