Can not boot with head version of linuxkit on macOS

[leoh0]

Description
I reinstalled latest version of linuxkit then I can not boot with ./boot.sh on macOS.

Steps to reproduce the issue:

1. Install or reinstall latest version of linuxkit on MacOS
2. And .. ./boot.sh

...
$ brew install --HEAD linuxkit # or brew reinstall --HEAD linuxkit
$ ./boot.sh

Describe the results you received:

$ linuxkit version
linuxkit version v0.3+
commit: 9d2c57564bd568b384def0f2a00091c13d296f91
$ ls -al *.iso
-rw-r--r-- 1 al staff 1803530240  4 23 16:22 kube-master-efi.iso
-rw-r--r-- 1 al staff 1166034944  4 23 16:24 kube-node-efi.iso
$ ./boot.sh
+ '[' -n '' ']'
+ mkdir -p kube-master-state
+ touch kube-master-state/metadata.json
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ exec linuxkit run -networking default -cpus 2 -mem 1024 -state kube-master-state -disk size=4G -data-file kube-master-state/metadata.json --uefi kube-master-efi.iso
FATA[0000] Cannot find kernel file: kube-master-efi.iso-kernel

Describe the results you expected:

Successful boot.

[rn]

Ah, I think I may have broken that with linuxkit/linuxkit#3002. I think we now need to specify -iso as well as I changed the auto-detect of the boot mode

[leoh0]

Thank you this works like a charm.