David Lozano

Seems it doesn't ``` jenkins@jnlp-slave-lw5hm:~/workspace/-4164-continuous-deployment-$ captain version v1.1.2 jenkins@jnlp-slave-lw5hm:~/workspace/-4164-continuous-deployment-$ captain build [CAPTAIN] Building image xxxx.dkr.ecr.eu-west-1.amazonaws.com/subscriber:latest Step 1 : FROM xxxx.dkr.ecr.eu-west-1.amazonaws.com/parent-ruby:2.1.10 Pulling repository xxxx.dkr.ecr.eu-west-1.amazonaws.com/parent-ruby unauthorized: authentication required jenkins@jnlp-slave-lw5hm:~/workspace/-4164-continuous-deployment-$ docker build ....

Thanks for the lightning fast answer. More info about our environment if it may help. We're building this images from a container with a kind of docker-on-docker config were we...

@kzk there is any change of this being merged? Should you accept a PR for a [unicorn 6.0](https://yhbt.net/unicorn/NEWS.html) upgrade?

I am also having the this issue when I switch to unicorn as Capybara rack server. In addition to @ArturT patch I needed to patch `port_in_use?` I use both puffing-billy...