diff --git a/cutekit/builder.py b/cutekit/builder.py
index 464ad69..b50fbff 100644
--- a/cutekit/builder.py
+++ b/cutekit/builder.py
@@ -244,9 +244,9 @@ def buildCmd(args: cli.Args):
     registry = model.Registry.use(args)
     target = model.Target.use(args)
     componentSpec = args.consumeArg()
-    if componentSpec is None:
-        raise RuntimeError("No component specified")
-    component = registry.lookup(componentSpec, model.Component)
+    component = None
+    if componentSpec is not None:
+        component = registry.lookup(componentSpec, model.Component)
     build(target, registry, component)[0]