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Pants

is something like this possible?
```go_binary(
    name="bin",
)

go_binary(
    name="bin-linux",
    env="GOOS=linux GOARCH=amd64"
)```


I don't think this is possible at the moment, but I also think it would be straightforward to add, if we got the modeling right. E.g., does the cross-compilation information live on `go_binary` or on `go_package`, or both? We'd just have to figure out how to represent this in the targets. <@U06A03HV1> <@U0N6C2Q9F> thoughts?

It would make total sense to support this for the docker use-case

In fact, it would even make sense to do this automatically when Pants knows it's about to embed the go binary in a docker image. But one thing at a time...