For the full story see: https://bugzilla.redhat.com/show_bug.cgi?id=1897839

In short, a Dockerfile like:

FROM registry.fedoraproject.org/fedora:rawhide
RUN dnf -y update
RUN dnf -y install texlive
RUN ls -l /usr/share/texlive/
RUN whoami
RUN test -w /usr/share/texlive/texmf-config/

will fail, even though /usr/share/texlive/texmf-config/ is owned by root.

See https://github.com/junghans/rawhide-latex/runs/1439529976?check_suite_focus=true for example using docker/[email protected], but I can reproduce this locally with Docker version 19.03.13, build 4484c46 (Fedora) and Docker version 19.03.13, build 4484c46d9d (OSX).

The funny part is that podman and docker with bash works as expected, but the default RUN with sh fails (see https://bugzilla.redhat.com/show_bug.cgi?id=1897839#c18).