(rootfs_htc-m7) install device-htc-m7 ERROR: 'Deviceinfo' object has no attribute 'dtb'

hello

pmbootstrap fails on this :

[16:40:44] (rootfs_htc-m7) install device-htc-m7
[16:40:48] ERROR: 'Deviceinfo' object has no attribute 'dtb'

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