With glibc-2.34.9000-34.fc36.x86_64, /etc/nsswitch.conf is no longer …

…present, but tests work anyway.

tests/Dockerfile

@@ -1,7 +1,7 @@
 FROM registry.fedoraproject.org/fedora
 RUN sed -i 's/^enabled.*/enabled=1/' /etc/yum.repos.d/CentOS-Stream-PowerTools.repo || :
 RUN dnf install -y --setopt=install_weak_deps=False python3-devel python3-setuptools python3-Cython make gcc libssh-devel openssh-server openssh-clients rpm-build
-RUN grep hosts: /etc/nsswitch.conf && sed -i 's/^hosts:.*/hosts: files dns myhostname/' /etc/nsswitch.conf
+RUN if test -f /etc/nsswitch.conf ; then grep hosts: /etc/nsswitch.conf && sed -i 's/^hosts:.*/hosts: files dns myhostname/' /etc/nsswitch.conf ; fi
 RUN echo 'set enable-bracketed-paste off' >> ~root/.inputrc
 RUN for i in rsa ecdsa ed25519 ; do /usr/libexec/openssh/sshd-keygen $i ; done
 RUN mkdir ~/.ssh && echo localhost $( cat /etc/ssh/ssh_host_ecdsa_key.pub ) > ~/.ssh/known_hosts