poky oe-init-build-env doesn't update local.conf with changes from local.conf.sample

Andy Basey

I have an existing build with packages defined in my own layer outside the build directory in the local.conf.sample
I want to add a package so I add it to my local.conf.sample and then source oe-init-build-env again
It doesn't overwrite the local.conf in poky/build/conf as it already exists

Is there a preferred way to make it update?
Or do I just need to manually delete the files in that directory and then run source oe-init-build-env?
I don't want to delete the whole build directory as it takes far too long to do it again from scratch

For reference I am using the local.conf.sample because that is my source controllable config file

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