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There is an alternative to `pulumi.concat`: interpolate.
```import * as k from "@pulumi/kubernetes";
const ns = new k.core.v1.Namespace(name, {
  metadata: {
      name: pulumi.interpolate`$kc2-${pulumi.getStack()}`,
    },
}, {
  provider: kubevirt,
});```

Heh, I made the same assumption as you :slightly_smiling_face: `getStack()` isn't an output. Still, this solution works for other cases where you _are_ using an output :slightly_smiling_face: