im using ubuntu 18.04 and im getting this error while executing the first program helloworld

                                                                                                             CMake Error at /home/hp/zephyr/cmake/extensions.cmake:1082 (message):
 Assertion failed: The detected dtc version is unsupported.The version was found to be 1.4.5 But the minimum supported version is 1.4.6
  • That sounds like an error when running, rather than an error when building - you really have 2 options: upgrade your system to 18.10 which has device-tree-compiler 1.4.7, or build a newer version of dtc from source Jan 22, 2019 at 13:04
  • 1
    What do you mean by Zephyr? Do you mean "Project Athena's notification service". If you mean this, then it is already packaged in Ubuntu (both server and client).
    – N0rbert
    Jan 22, 2019 at 19:51
  • 1
    Possible duplicate of How do I install applications in Ubuntu?
    – karel
    Jan 26, 2019 at 3:12

1 Answer 1


As steeldriver suggested, device-tree-compiler (dtc) is below the minimum version that zephyr requires. I faced a similar issue with my build and fixed it as follows:-

  1. Get the latest stable version of device-tree-compiler (check that it says current-stable and not active development). Currently it is 1.4.7-1.
  2. Unzip the package:-

    tar xvf device-tree-compiler_1.4.7.orig.tar.xz
  3. Install required dependencies:-

    sudo apt-get install flex bison swig python-dev
  4. Navigate to the project directory and build the project:-

    cd dtc-1.4.7 && make
  5. Replace the existing dtc with the latest installed. You can do this by updating your $PATH or moving the installed dtc to /usr/bin

  6. Ensure that the default dtc is now the latest

    cd ~/ && dtc --version

This should return Version: DTC 1.4.7. After that, rebuild your HelloWorld program and it should be good to go.

I hope this helps.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.