Nest can't resolve dependencies

[stray rivet]

import {
   ApolloServerPluginLandingPageLocalDefault,
} from "@apollo/server/plugin/landingPage/default";
import { ApolloDriver, type ApolloDriverConfig } from "@nestjs/apollo";
import { Module } from "@nestjs/common";
import { ConfigModule } from "@nestjs/config";
import { GraphQLModule } from "@nestjs/graphql";
import { HelloModule } from ".source/module/hello.module";

@Module({
  imports: [
    ConfigModule.forRoot({
      isGlobal: true,
      ignoreEnvFile: false,
      envFilePath: ["../../.env"],
    }),
    GraphQLModule.forRoot<ApolloDriverConfig>({
      driver: ApolloDriver,
      sortSchema: true,
      playground: false,
      autoSchemaFile: true,
      plugins:[ApolloServerPluginLandingPageLocalDefault()],
      subscriptions: {
    "graphql-ws": true,
      },
    }),
    HelloModule,
  ],
  providers: [],
})
export class AModule {}

import { Module } from "@nestjs/common";
import { HelloResolver } from ".source/resolver/hello.resolver";
import { HelloService } from ".source/service/hello.service";

@Module({
  providers: [HelloResolver, HelloService],
})
export class HelloModule {}

import { Query, Resolver } from "@nestjs/graphql";
import type { HelloService } from ".source/service/hello.service";

@Resolver()
export class HelloResolver {
  constructor(private readonly helloService: HelloService) {}

  @Query(() => String)
  public async hello(): Promise<string> {
    return this.helloService.hello();
  }
}

import { Injectable } from "@nestjs/common";

@Injectable()
export class HelloService {
  public async hello(): Promise<string> {
    return "World";
  }
}