diff --git a/script/tools/save_update_project_data.py b/script/tools/save_update_project_data.py
index 02a79188f0b72b250cf101d65d327f9b72331206..92960e998787017f0ed85799e17345332ec391a8 100644
--- a/script/tools/save_update_project_data.py
+++ b/script/tools/save_update_project_data.py
@@ -144,7 +144,7 @@ def construct_data(project_config, package_repos):
     config_dict['package_repos'] = package_repos
     config_dict['build_targets'] = project_config['build_targets']
     config_dict['bootstrap_rpm_repo'] = project_config['bootstrap_rpm_repo']
-    tmp_str = f"tag: {tag_str}\n"
+    tmp_str = f"build_tag: {tag_str}\n"
     config_dict['build_env_macros'] = yaml.safe_load(tmp_str + project_config['build_env_macros'])
     return config_dict