Nest.js + CodeFirst GraphQLでschema.gqlが生成できない

Error: Expected undefined to be a GraphQL schema.

こんな感じのバージョンで動かない。

"@nestjs/common": "^8.0.0",
"@nestjs/core": "^8.0.0",
"@nestjs/graphql": "^9.1.2",
"@nestjs/platform-express": "^8.0.0",
"graphql": "^16.3.0"

graphql v16とは相性が悪いっぽい

一旦ダウングレードすれば動いた感じ

yarn add graphql@15.7.1

• @nestjs/graphql@9.1.1 not compatible with GraphQL@16 · Issue #8551 · nestjs/nest
• javascript - NestJS - Expected undefined to be a GraphQL schema - Stack Overflow