Hi, I noticed that sed fails to build on my Fedora machine, but it builds successfully on Guix System. The error is: --8<---------------cut here---------------start------------->8--- ERROR: testsuite/inplace-selinux ================================ inplace-selinux.sh: set-up failure: CONFIG_HEADER not defined ERROR testsuite/inplace-selinux.sh (exit status: 99) --8<---------------cut here---------------end--------------->8--- It appears related to this issue: https://lists.gnu.org/archive/html/bug-sed/2019-06/msg00022.html "This error comes from 'init.cfg' in the 'require_selinux_' function. It happens when the system supports SELinux (based on /proc/filesystems), but during the './configure' step, somehow the generated Makefile did not contain a 'CONFIG_HEADER = config.h' statement (very strange)." Indeed, /proc/filesystems within the Guix sandbox on my Fedora system looks like this: --8<---------------cut here---------------start------------->8--- nodev sysfs nodev tmpfs nodev bdev nodev proc nodev cgroup nodev cgroup2 nodev cpuset nodev devtmpfs nodev configfs nodev debugfs nodev tracefs nodev securityfs nodev sockfs nodev bpf nodev pipefs nodev ramfs nodev hugetlbfs nodev devpts ext3 ext2 ext4 nodev autofs nodev mqueue nodev selinuxfs nodev pstore fuseblk nodev fuse nodev fusectl nodev rpc_pipefs iso9660 --8<---------------cut here---------------end--------------->8--- However, on a vanilla Guix System (gnu/system/examples/vm-image.tmpl) it looks like this: --8<---------------cut here---------------start------------->8--- nodev sysfs nodev tmpfs nodev bdev nodev proc nodev cgroup nodev cgroup2 nodev cpuset nodev devtmpfs nodev debugfs nodev tracefs nodev securityfs nodev sockfs nodev bpf nodev pipefs nodev ramfs nodev hugetlbfs nodev devpts ext3 ext2 ext4 vfat nodev ecryptfs nodev mqueue nodev pstore nodev 9p --8<---------------cut here---------------end--------------->8--- Note that "selinuxfs" is present in the Fedora case, but missing in the Guix System case. It seems very likely that this is causing the failure. We probably need to modify something in the sed build logic to make it succeed even when "selinuxfs" is present. -- Chris