TRPC type checking during build fails

Environment: node 18.6.0, yarn
Whats wrong:
Type checking at build time fails. . I think this might be an issue with the Lambda Adapter
These scripts are run. deploying through AWS amplify. this doesn't error locally
$ yarn run typecheck
$ yarn run build
client scripts

  "scripts": {
    "start": "vite",
    "build": "vite build",
    "serve": "vite preview",
    "typecheck": "tsc --noEmit"
  },

client trpc

import { createTRPCReact, inferReactQueryProcedureOptions } from "@trpc/react-query";
import { inferRouterInputs, inferRouterOutputs } from "@trpc/server";
import { type AppRouter } from "server"

export const trpc = createTRPCReact<AppRouter>(); // <---- TSC FAILS HERE

server trpc

import { inferAsyncReturnType, initTRPC } from "@trpc/server";
import { CreateAWSLambdaContextOptions } from "@trpc/server/adapters/aws-lambda";
import { APIGatewayProxyEventV2 } from "aws-lambda/trigger/api-gateway-proxy";

export const createContext = ({
  event,
  context,
}: CreateAWSLambdaContextOptions<APIGatewayProxyEventV2>) => ({
  event: event,
  apiVersion: (event as { version?: string }).version || "1.0",
  user: event.headers["x-user"],
});

type Context = inferAsyncReturnType<typeof createContext>;
const t = initTRPC.context<Context>().create();
...

router

import { publicProcedure, router } from "../utils/trpc";
export type AppRouter = typeof appRouter

export const appRouter = router({
  hello: publicProcedure.query(() => "Hello World!"),
});

error traceback attached

Make sure all your trpc versions are the same

Everything is on the latest version