diff --git a/src/lint.py b/src/lint.py
index fc495d6..77384c7 100644
--- a/src/lint.py
+++ b/src/lint.py
@@ -173,7 +173,7 @@ def is_default(validator, properties, instance, schema):
     print(f"::error file={build}::The build.json file is missing")
     sys.exit(1)
 
-if "build_from" in build_configuration and set(configuration["arch"]) != set(build_configuration["build_from"]):
+if "build_from" in build_configuration and not isinstance(build_configuration["build_from"], str) and set(configuration["arch"]) != set(build_configuration["build_from"]):
     print(f"::error file={build}::Architectures in config and build do not match")
     exit_code = 1