docs: improve installation instructions for debian
@@ -112,6 +112,13 @@ To install on the following operating systems, set the environment variable $OS
| Ubuntu 19.04 | `xUbuntu_19.04` |
| Ubuntu 18.04 | `xUbuntu_18.04` |
+If installing cri-o-runc (recommended), you'll need to install libseccomp >= 2.4.1. This is not available in distros based on Debian buster or below, so buster backports will need to be enabled:
+```shell
+echo 'deb http://deb.debian.org/debian buster-backports main' > /etc/apt/sources.list.d/backports.list
+apt update
+apt install -y libseccomp2 || apt update -y libseccomp2
+```
+
And then run the following as root:
```shell
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
