Issue with Buildkite with Docker on AWS

Hi there, I'm trying to use buildkite with AWS, to run a Docker build. We are pulling some code from github in the docker file through SSH, which seems to be causing an error. I know it's not an error with the SSH key configuration in AWS, because it's able to pull the code from github initially (it's just a dependency call that isn't working). Here's the error message I'm getting:

#14 0.325 container_linux.go:380: starting container process caused: process_linux.go:545: container init caused: rootfs_linux.go:76: mounting "/var/lib/docker/2000.1001/tmp/.buildkit-ssh-sock224499185/ssh_auth_sock" to rootfs at "/run/buildkit/ssh_agent.0" caused: stat /var/lib/docker/2000.1001/tmp/.buildkit-ssh-sock224499185/ssh_auth_sock: permission denied

Any help is appreciated, thanks!