An install script for kexec-tools uses process substitution which fails in osbuild with

/lib/kdump/kdump-lib.sh: line 1107: /dev/fd/63: No such file or directory

It should be enough to link /dev/fd to /proc/self/fd.

For more details https://issues.redhat.com/browse/RHEL-19085?focusedId=23628824&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-23628824
Similar old issue in Anaconda: https://bugzilla.redhat.com/show_bug.cgi?id=784159