Using Spring boot/cloud with Amazon AWS lambda does not inject values

I have an AWS lambda RequestHandler class which is invoked directly by AWS. Eventually I need to get it working with Spring Boot because I need it to be able to retrieve data from Spring Cloud configuration server.

The problem is that the code works if I run it locally from my own dev environment but fails to inject config values when deployed on AWS.

@Configuration
@EnableAutoConfiguration
@ComponentScan("my.package")
public class MyClass implements com.amazonaws.services.lambda.runtime.RequestHandler<I, O> {
   public O handleRequest(I input, Context context) {
        ApplicationContext applicationContext = new SpringApplicationBuilder()
                .main(getClass())
                .showBanner(false)
                .web(false)
                .sources(getClass())
                .addCommandLineProperties(false)
                .build()
                .run();

        log.info(applicationContext.getBean(SomeConfigClass.class).foo);
        // prints cloud-injected value when running from local dev env
        //
        // prints "${path.to.value}" literal when running from AWS 
        //    even though Spring Boot starts successfully without errors
   }
}

@Configuration
public class SomeConfigClass {
   @Value("${path.to.value}")
   public String foo;
}

src/main/resources/bootstrap.yml:
spring:
  application:
    name: my_service
cloud:
  config:
    uri: http://my.server
    failFast: true
    profile: localdev

What have I tried:

• using regular Spring MVC, but this doesn't have integration with @Value injection/Spring cloud.
• using @PropertySource - but found out it doesn't support .yml files
• verified to ensure the config server is serving requests to any IP address (there's no IP address filtering)
• running curl to ensure the value is brought back
• verified to ensure that .jar actually contains bootstrap.yml at jar root
• verified to ensure that .jar actually contains Spring Boot classes. FWIW I'm using Maven shade plugin which packages the project into a fat .jar with all dependencies.

Note: AWS Lambda does not support environment variables and therefore I can not set anything like spring.application.name (neither as environment variable nor as -D parameter). Nor I can control the underlying classes which actually launch MyClass - this is completely transparent to the end user. I just package the jar and provide the entry point (class name), rest is taken care of.

Is there anything I could have missed? Any way I could debug this better?