export ANDROID_PRODUCT_OUT=~/android/out/target/product/raven
fastboot flash boot boot.img Use:
export ANDROID_PRODUCT_OUT=/path/to/your/images/folder Example:
fastboot: ANDROID_PRODUCT_OUT not set You typed what you thought was the correct command, but instead of flashing, Fastboot just stares back at you with that vague error. Don’t worry—this is a common hurdle, and fixing it is simple once you understand what’s happening. In simple terms, Fastboot is looking for an environment variable called ANDROID_PRODUCT_OUT that points to a folder on your computer . This folder should contain the compiled Android images you want to flash (e.g., boot.img , system.img , vendor.img ). fastboot android-product-out not set
fastboot flash boot /full/path/to/boot.img This is often the quickest workaround if you’re only flashing one or two partitions. If you compiled Android from source, the build system already knows where your images are. Navigate to your Android root directory and run:
echo 'export ANDROID_PRODUCT_OUT=~/android/out/target/product/raven' >> ~/.bashrc source ~/.bashrc Just remember to update the path when you switch devices or build new images. The ANDROID_PRODUCT_OUT not set error is simply Fastboot’s way of saying, “I don’t know where your images are.” It’s not a bug or a driver issue—just a missing pointer. Whether you set the variable, use absolute paths, or source your build environment, you’ll be flashing again in seconds.
echo $ANDROID_PRODUCT_OUT After setting the variable, test it: This folder should contain the compiled Android images
source build/envsetup.sh lunch <your_device_choice> After that, the variable is automatically set. You can verify with:
If you’ve ever tried to flash a custom ROM, kernel, or system image onto an Android device using Fastboot, you might have run into this frustrating line in your terminal:
echo $ANDROID_PRODUCT_OUT # Linux/macOS echo %ANDROID_PRODUCT_OUT% # Windows CMD You should see the full path to your images folder. Then try a harmless Fastboot command, like: Navigate to your Android root directory and run:
Instead of:
set ANDROID_PRODUCT_OUT=C:\path\to\your\images\folder
$env:ANDROID_PRODUCT_OUT="C:\path\to\your\images\folder" Once set, run your fastboot command again. You don’t actually need the environment variable. Simply specify the full path to the image you want to flash.
fastboot getvar product If that works without errors, you’re good to go. If you constantly work with Fastboot and AOSP, add the export line to your shell configuration file ( ~/.bashrc , ~/.zshrc , or ~/.profile on Linux/macOS). For example:
