kaniko: operation not permitted when trying to build with kaniko

Hi,

I’m trying to build this image: https://github.com/gooflix/backend-demo/blob/master/Dockerfile

but it always fails with:

INFO[0000] Downloading base image maven:3.5-jdk-8       
2018/11/20 18:35:44 No matching credentials were found, falling back on anonymous
INFO[0001] Executing 0 build triggers                   
INFO[0001] Unpacking rootfs as cmd RUN mvn -f /usr/src/backend-demo/pom.xml clean package requires it. 
error building image: error building stage: chmod /bin: operation not permitted

the command I run is:

executor --context dir://$(pwd)/ --tarPath=kaniko-test.tar --no-push

I don’t use the docker image as I need a custom build image that provides additional toolss etc. - the above was used as a “simplified” example to start with …

executor runs inside a pod on a k8s, as non-root in case that makes this problematic?

I’m not sure where the chmod is coming from as the Dockerfile does not contain that command, I’m taking a guess (without looking) that it might be from the source image?

Any help with this would be really appreciated! Thanks!