How does --hostname work with `buildah run`?

Give the example here which has an attempt at setting the hostname to foo.bar.baz for the duration of the build, #!/bin/bash ctr=$(buildah from alpine:3) buildah run --hostname 'foo.bar.baz' $ctr /bin/sh <<-'EOF' echo "/usr/bin/hostname returns [$(hostname)]"; EOF I get the following output, /usr/bin/hostname returns [myHostname] I was expecting hostname to return foo.bar.baz. I'm using Debian Testing's buildah package 1.15.2-1. ❯ buildah version Version: 1.15.2 Go Version: go1.14.7 Image Spec: 1.0.1 Runtime Spec: 1.0.2-dev CNI Spec: 0.4.0 libcni Version: image Version: 5.5.2 Git Commit: Built: Wed Dec 31 18:00:00 1969 OS/Arch: linux/amd64 But I've also tested it on 1.17, ❯ buildah version Version: 1.17.0 Go Version: go1.15.2 Image Spec: 1.0.1-dev Runtime Spec: 1.0.2-dev CNI Spec: 0.4.0 libcni Version: image Version: 5.7.0 Git Commit: Built: Wed Dec 31 18:00:00 1969 OS/Arch: linux/amd64