"Failed to parse syntax of config file" when using config from D1 tutorial

import type { PrismaConfig } from 'prisma';
import { PrismaD1 } from '@prisma/adapter-d1';

// import your .env file
import 'dotenv/config';

export default {
    experimental: {
        adapter: true,
    },
    schema: 'prisma/schema.prisma',
    async adapter() {
        return new PrismaD1({
            CLOUDFLARE_D1_TOKEN: process.env.CLOUDFLARE_D1_TOKEN!,
            CLOUDFLARE_ACCOUNT_ID: process.env.CLOUDFLARE_ACCOUNT_ID!,
            CLOUDFLARE_DATABASE_ID: process.env.CLOUDFLARE_DATABASE_ID!,
        });
    },
} satisfies PrismaConfig;