Since the update to Shepherd 0.4.0, I've found that OpenSSH's sshd is killed almost immediately after it starts with signal 15. I confirmed the issue started with the Shepherd upgrade by bisecting our Git history. I can reproduce the issue from commit b6beda1d6b9093a8493b5c3cde33ed522242c451 (gnu: Add botan.). One interesting tidbit is that the PID file '/var/run/sshd.pid' is not created anymore. And if I create an empty PID file by hand, it is removed after trying to start the ssh-daemon service. Also, the sshd user's home '/var/run/sshd' does not exist, and is similarly removed if it does exist. I ran the OpenSSH system test `make check-system TESTS=openssh` and it failed when it could not find the PID file. It passed on another non-GuixSD machine. The failing machine is relatively slow and lacks KVM: a ThinkPad x200s. After boot, trying to start the service again with `herd start ssh-daemon` gives the same result. I modified the sshd invocation to print some debug output ('-d -E /tmp/sshd.log') and this is what it shows: ------ debug1: sshd version OpenSSH_7.6, OpenSSL 1.0.2o 27 Mar 2018 debug1: private host key #0: ssh-rsa SHA256:REDACTED debug1: private host key #1: ssh-dss SHA256:REDACTED debug1: private host key #2: ecdsa-sha2-nistp256 SHA256:REDACTED debug1: private host key #3: ssh-ed25519 SHA256:REDACTED debug1: rexec_argv[0]='/gnu/store/az7vib8gk16fybhshh5xpkljmgxyrs4k-openssh-7.6p1/sbin/sshd' debug1: rexec_argv[1]='-D' debug1: rexec_argv[2]='-d' debug1: rexec_argv[3]='-E' debug1: rexec_argv[4]='/tmp/sshd.log' debug1: rexec_argv[5]='-f' debug1: rexec_argv[6]='/gnu/store/miy7xg5j4fg3mn04mcl27awmcl6s97ss-sshd_config' debug1: Set /proc/self/oom_score_adj from 0 to -1000 debug1: Bind to port 22 on 0.0.0.0. Server listening on 0.0.0.0 port 22. debug1: Bind to port 22 on ::. Server listening on :: port 22. Received signal 15; terminating. ------ My system configuration file, the shepherd log messages, and the OpenSSH system test logs are attached. Any ideas?