gitlab-ci-multi-runner register --non-interactive does not correctly write config.toml

Summary

Hello guys. Using gitlab-ci-multi-runner register --non-interactive appears to miss to write some settings to config.toml. What am I doing wrong?

Steps to reproduce

Run as root / with sudo: gitlab-ci-multi-runner register --non-interactive --registration-token ... --url https://gitlab..../ci --name test --executor virtualbox --virtualbox-base-name somebasename --virtualbox-base-snapshot 0x00 --virtualbox-disable-snapshots false --ssh-host 127.0.0.1 --ssh-port 22 --ssh-identity-file /some/file --ssh-user abc123 --ssh-password password123 -c /etc/gitlab-runner/config.toml

Actual behavior

/etc/gitlab-runner/config.toml looks like this:

concurrent = 1
check_interval = 0

[[runners]]
  name = "test"
  url = "https://gitlab..../ci"
  token = "..."
  executor = "virtualbox"
  [runners.cache]

Expected behavior

concurrent = 1
check_interval = 0

[[runners]]
  name = "test"
  url = "https://gitlab..../ci"
  token = "..."
  executor = "virtualbox"
  [runners.ssh]
    port = "22"
    user = "abc123"
    password = "password123"
    ...
  [runners.virtualbox]
    ...

Relevant logs and/or screenshots

N/A

Environment description

PRETTY_NAME="Debian GNU/Linux 8 (jessie)"
NAME="Debian GNU/Linux"
VERSION_ID="8"
linux 3.16.0-4-amd64
Installed via
$ curl -L https://packages.gitlab.com/install/repositories/runner/gitlab-ci-multi-runner/script.deb.sh | sudo bash
$ cat > /etc/apt/preferences.d/pin-gitlab-runner.pref <<EOF
$ sudo apt-get install gitlab-ci-multi-runner

Used GitLab Runner version

Version:      1.10.4
Git revision: b32125f
Git branch:   1-10-stable
GO version:   go1.7.5
Built:        Tue, 31 Jan 2017 14:39:18 +0000
OS/Arch:      linux/amd64

Thank you!

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