Fix package installation in CI

scripts/build.py

@@ -77,7 +77,7 @@ def build_package(repo_dir, package_dir, name,
         for entry in _get_log_entries():
             run_checked(command + [entry])
 
-        command = ["apt-get", "build-dep", name]
+        command = ["apt-get", "build-dep", "-y", name]
         run_checked(command)
 
         command = ["debuild", "-b", "-uc", "-us"]