Hi Richard, thanks for the suggestions; I think I have a more fundamental problem here, as after I added yajl, it complained about hivex, then about augeas. But for now I would be content with a working build, and later address the underling root cause if any, so for now I am adding them all; but I am stuck with libiconv as I have built it manually, so it's not a package. What could be a "proper" way to add it to the supermin image? $  make quickcheck ... + guestfsd --verbose guestfsd: error while loading shared libraries: libiconv.so.2: cannot open shared object file: No such file or directory + sync + test '' = 1 + reboot -f $ ldd /tmp/supermin.d/usr/sbin/guestfsd ...    libiconv.so.2 => /home/vm/install/lib/libiconv.so.2 (0x00007fc03464d000) I could not check the linkage with ./run virt-rescue --scratch, as the shell appears to be blocked whatever command I type. Here's the output (some of the errors may be the root cause of all that? on the same system build 1.34 works, built following the same recipe): $ ./run virt-rescue --scratch [    0.168448] usbserial: usb_serial_init - usb_register failed [    0.169093] usbserial: usb_serial_init - returning with error -19 supermin: mounting /proc supermin: ext2 mini initrd starting up: 5.1.19 glibc Starting /init script ... [/usr/lib/tmpfiles.d/systemd.conf:11] Unknown group 'utmp'. [/usr/lib/tmpfiles.d/systemd.conf:19] Unknown user 'systemd-network'. [/usr/lib/tmpfiles.d/systemd.conf:20] Unknown user 'systemd-network'. [/usr/lib/tmpfiles.d/systemd.conf:21] Unknown user 'systemd-network'. [/usr/lib/tmpfiles.d/systemd.conf:25] Unknown group 'systemd-journal'. [/usr/lib/tmpfiles.d/systemd.conf:26] Unknown group 'systemd-journal'. starting version 219 specified group 'input' unknown /init: line 120: ip: command not found /init: line 121: ip: command not found mdadm: No arrays found in config file or automatically   WARNING: Failed to connect to lvmetad. Falling back to device scanning. mdadm: No arrays found in config file or automatically [ ] guestfsd: error while loading shared libraries: libiconv.so.2: cannot open shared object file: No such file or directory ------------------------------------------------------------ Welcome to virt-rescue, the libguestfs rescue shell. Note: The contents of / (root) are the rescue appliance. You have to mount the guest’s partitions under /sysroot before you can examine them. ><rescue> ldd /usr/sbin/guestfsd .... wait forever ...