It stops towards the end and dumps the error in /root/debootstrap/debootstrap.log
It is...
Setting up libtext-wrapi18n-perl (0.06-7) ... Setting up libpam-modules:armhf (1.1.8-3.1+deb8u1) ... Setting up libpam-runtime (1.1.8-3.1+deb8u1) ... Setting up debconf-i18n (1.5.56) ... Setting up passwd (1:4.2-3+deb8u1) ... Shadow passwords are now on. Setting up login (1:4.2-3+deb8u1) ... Setting up adduser (3.113+nmu3) ... Setting up libuuid1:armhf (2.25.2-6) ... Setting up libblkid1:armhf (2.25.2-6) ... Setting up libmount1:armhf (2.25.2-6) ... Setting up util-linux (2.25.2-6) ... update-alternatives: using /bin/more to provide /usr/bin/pager (pager) in auto mode Setting up libcryptsetup4:armhf (2:1.6.6-5) ... Setting up mount (2.25.2-6) ... Setting up e2fsprogs (1.42.12-2) ... Setting up udev (215-17+deb8u5) ... Adding group `input' (GID 101) ... Done. A chroot environment has been detected, udev not started. update-initramfs: deferring update (trigger activated) Setting up systemd (215-17+deb8u5) ... Failed to open /dev/urandom: Input/output error dpkg: error processing package systemd (--configure): subprocess installed post-installation script returned error exit status 1 Setting up dmsetup (2:1.02.90-2.2+deb8u1) ... update-initramfs: deferring update (trigger activated) Setting up initramfs-tools (0.120+deb8u2) ... update-initramfs: deferring update (trigger activated) Setting up plymouth (0.9.0-9) ... update-initramfs: deferring update (trigger activated) update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults Setting up mountall (2.54) ... dpkg: systemd-sysv: dependency problems, but configuring anyway as you requested: systemd-sysv depends on systemd (= 215-17+deb8u5); however: Package systemd is not configured yet. systemd-sysv depends on systemd; however: Package systemd is not configured yet.
Setting up systemd-sysv (215-17+deb8u5) ... Setting up init (1.22) ... Processing triggers for initramfs-tools (0.120+deb8u2) ... Errors were encountered while processing: systemd