ぐぬぬ
一回展開しないとだめぽいか

$ zcat ~/Downloads/2018-06-27-raspbian-stretch.zip | popsicle -u - /dev/mmcblk0
popsicle: error with image at '-': image could not be opened: No such file or directory (os error 2)
$ zcat ~/Downloads/2018-06-27-raspbian-stretch.zip | popsicle -u /dev/stdin /dev/mmcblk0
popsicle: error with image at '/dev/stdin': image was not a file
$ mkfifo zip.img
$ zcat ~/Downloads/2018-06-27-raspbian-stretch.zip > ./zip.img &
$ sudo popsicle ./zip.img /dev/mmcblk0
popsicle: error with image at './zip.img': image was not a file