this derivation will be built:
  /nix/store/5m97bvkk75dv99wpqazxvz26cdlh2srq-treefmt-check.drv
error: Cannot build '/nix/store/5m97bvkk75dv99wpqazxvz26cdlh2srq-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/h7flph69rwdkk1k5qrrvfwc3f046z5fq-treefmt-check
       Last 25 log lines:
       > +++ b/packages/spaces-integration-gateway/gateway-core.ts
       > @@ -113,8 +113,7 @@ export interface McpStep {
       >  }
       >  
       >  export type McpExchangeResult =
       > -  | { ok: true; reply: Record<string, unknown> }
       > -  | { ok: false; reason: string };
       > +  { ok: true; reply: Record<string, unknown> } | { ok: false; reason: string };
       >  
       >  /**
       >   * One MCP exchange on a fresh unix-socket connection, the "MCP wire". It speaks
       > diff --git a/tests/inference.nix b/tests/inference.nix
       > index 827865f..c75d810 100644
       > --- a/tests/inference.nix
       > +++ b/tests/inference.nix
       > @@ -159,7 +159,8 @@ in
       >          (sys [
       >            alice
       >            on
       > -        ]).services.hermes-microvm.settings ? providers;
       > +        ]).services.hermes-microvm.settings
       > +          ? providers;
       >        expected = false;
       >      };
       >    };
       For full logs, run:
         nix log /nix/store/5m97bvkk75dv99wpqazxvz26cdlh2srq-treefmt-check.drv