```sh
# Build MinIO from source
go install github.com/minio/minio@latest

# Create the bin directory in your chroot
mkdir -p /mnt/export/${USER}/bin

# Copy the built binary to the chroot directory
cp $(go env GOPATH)/bin/minio /mnt/export/${USER}/bin/minio
chmod +x /mnt/export/${USER}/bin/minio
```

Alternatively, if you have an existing legacy binary, you can still use it, but note that it will not receive updates.