设备型号是Redmi note7 Pro
```bash
[kgs-surfacepro4 tmp]# brunch violet
16:12:53 Build sandboxing disabled due to nsjail error.
In file included from build/make/core/config.mk:291:
In file included from build/make/core/envsetup.mk:277:
In file included from build/make/core/board_config.mk:142:
device/xiaomi/violet/BoardConfig.mk:155: error: cannot assign to readonly variable: PRODUCT_DEXPREOPT_SPEED_APPS
16:12:53 dumpvars failed with: exit status 1
Device violet not found. Attempting to retrieve device repository from LineageOS Github (http://github.com/LineageOS).
Found repository: android_device_xiaomi_violet
Default revision: lineage-18.0
Checking branch info
Default revision lineage-18.0 not found in android_device_xiaomi_violet. Bailing.
Branches found:
lineage-16.0
Use the ROOMSERVICE_BRANCHES environment variable to specify a list of fallback branches.
16:12:57 Build sandboxing disabled due to nsjail error.
In file included from build/make/core/config.mk:291:
In file included from build/make/core/envsetup.mk:277:
In file included from build/make/core/board_config.mk:142:
device/xiaomi/violet/BoardConfig.mk:155: error: cannot assign to readonly variable: PRODUCT_DEXPREOPT_SPEED_APPS
16:12:57 dumpvars failed with: exit status 1
16:12:58 Build sandboxing disabled due to nsjail error.
In file included from build/make/core/config.mk:291:
In file included from build/make/core/envsetup.mk:277:
In file included from build/make/core/board_config.mk:142:
device/xiaomi/violet/BoardConfig.mk:155: error: cannot assign to readonly variable: PRODUCT_DEXPREOPT_SPEED_APPS
16:12:58 dumpvars failed with: exit status 1
** Don't have a product spec for: 'lineage_violet'
** Do you have the right repo manifest?
No such item in brunch menu. Try 'breakfast'
```