Can't use custom docker image?

[jD91mZM2]

I have this Cargo.toml:

[package]
name = "play-youtube"
version = "0.1.0"
authors = ["LEGOlord208 <LEGOlord208@krake.one>"]

[dependencies]
# dependencies here

[target.x86_64-unknown-linux-gnu]
image = "play-youtube"

I have the play-youtube docker image with the latest tag.

Using cross build --release -v --target x86_64-unknown-linux-gnu,
I just see that it doesn't use the image - AND it prints
warning: unused manifest key: target.x86_64-unknown-linux-gnu.image

Help?

EDIT: s/cargo build/cross build

[Emilgardis]

Hello Legolord! Nice to see you trying to use cross.

So, the image tag is supposed to go into Cross.toml, not Cargo.toml.
https://github.com/japaric/cross#custom-docker-images

Also, you'll have to run cross build --release --target x86_64-unknown-linux-gnu so that you actually launch cross. Hopefully that fixes things.

[jD91mZM2]

Ohh! That makes sense! Nice to see it's a separate config. Sorry for not reading carefully enough.
Thanks for your help!

(Though, cargo build was a typo. I meant cross build there.)

[Alexhuszagh]

This was much more satisfactorily implemented in #678.