```rust
use std::fmt;
use std::fmt::Display;
use chrono::NaiveDate;
use uuid::Uuid;

struct Machine {
    serial_number: String,
    build_date: NaiveDate,
    location: String,
    model_id: Uuid,
}

impl Display for Machine {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "Machine {{\n  serial_number: {},\n  build_date: {},\n  location: {},\n  model_id: {}\n}}",
            self.serial_number, self.build_date, self.location, self.model_id
        )
    }
}
```
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