environment with t3 stack
I was trying to make a environment veriable using t3 stack but i always get error about type not found. how can i solve it?

import { createEnv } from '@t3-oss/env-nextjs';
import { z } from 'zod';
export const env = createEnv({
server: {},
client: {
NEXT_PUBLIC_API_BASE_URL: z.string().url(),
},
runtimeEnv: {
NEXT_PUBLIC_API_BASE_URL: process.env.NEXT_PUBLIC_API_BASE_URL,
},
});