Created symlink '/home/martin/work/distro-gomspace_tmp/build/tmp/work/nanomind_z7020_zed-gomspace-linux-gnueabi/nanomind-dev-image/1.0/rootfs/etc/systemd/system/multi-user.target.wants/busybox-klogd.service' → '/usr/lib/systemd/system/busybox-klogd.service'.
Created symlink '/home/martin/work/distro-gomspace_tmp/build/tmp/work/nanomind_z7020_zed-gomspace-linux-gnueabi/nanomind-dev-image/1.0/rootfs/etc/systemd/system/multi-user.target.wants/sysstat.service' → '/usr/lib/systemd/system/sysstat.service'.
Failed to enable unit: Refusing to operate on template unit nanomind-gpio-ctrl@.service when destination unit multi-user.target is a non-template unit
Failed to enable unit: Refusing to operate on template unit nanomind-bank-ctrl@.service when destination unit multi-user.target is a non-template unit
Created symlink '/home/martin/work/distro-gomspace_tmp/build/tmp/work/nanomind_z7020_zed-gomspace-linux-gnueabi/nanomind-dev-image/1.0/rootfs/etc/systemd/system/multi-user.target.wants/redis.service' → '/usr/lib/systemd/system/redis.service'.
.

Configuring sysstat.
Configuring nanomind-gpio-ctrl.
nanomind-gpio-ctrl.postinst returned 1, marking as unpacked only, configuration required on target.
Configuring nanomind-bank-ctrl.
nanomind-bank-ctrl.postinst returned 1, marking as unpacked only, configuration required on target.
Configuring bash-completion.
Configuring libiio-bash-completion.

[Unit]
Description=GPIO Control Service (%i)

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/gpioset --daemonize --chip gpiochip0 %i=1
ExecStartPost=/bin/sleep .3
ExecStopPost=/usr/bin/gpioset --toggle 0 --chip gpiochip0 %i=0
ExecStopPost=/bin/sleep .3

[Install]
WantedBy=multi-user.target

AFAICT, the issue only applies for template units - other seem to install/configure fine.

What puzzles me is why I am seemingly the only one running into this - I consider both the recipe and service file to be quite standard...