imx6 image stuck in u-boot

https://arm01.puri.sm/job/Images/job/Image%20Build/732/ gets stuck while looking for a device:

U-Boot 2017.07-28563-g04d7ed8078 (Dec 24 2017 - 20:46:50 +0100)

CPU:   Freescale i.MX6QP rev1.0 at 792 MHz
Reset cause: POR
Board: nitrogen6_max
I2C:   ready
DRAM:  3.8 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
SF: Detected sst25vf016b with page size 256 Bytes, erase size 4 KiB, total 2 MiB
auto-detected panel 1280x720M@60
Display: hdmi:1280x720M@60 (1280x720)
In:    serial
Out:   serial
Err:   serial
Net:   Micrel ksz9021 at 6
FEC [PRIME], usb_ether
Hit any key to stop autoboot:  0 
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part 
No port device detected!
** Bad device size - sata 0 **
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part 
No port device detected!
** Bad device sata 1 **
switch to partitions #0, OK
mmc0 is current device
** File not found /6x_bootscript **
timeout irqstat=10000
timeout irqstat=10000
switch to partitions #0, OK
mmc1(part 0) is current device
** No partition table - mmc 1 **
starting USB...
USB0:   Port not available.
USB1:   USB EHCI 1.00
scanning bus 1 for devices... EHCI timed out on TD - token=0x80008c80
unable to get device descriptor (error=-1)
2 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
       scanning usb for ethernet devices... 0 Ethernet Device(s) found

USB device 0: unknown device
** Bad device usb 0 **

USB device 1: unknown device
** Bad device usb 1 **

6x_bootscript not found

serial console at 115200, 8N1

details at http://boundarydevices.com/6q_bootscript
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part 
No port device detected!
timeout irqstat=10000
timeout irqstat=10000
switch to partitions #0, OK
mmc1(part 0) is current device
expose MMC 1 over USB
UMS: LUN 0, dev 1, hwpart 0, sector 0x0, count 0x710000
/

I checksummed my SD card contents against the image, so it's unlikely to be the issue. It would be nice if someone could check if this happens with their board too before I dive into bisecting things.

A suggestion for a temporary image to use would be nice too.