The “Clean out the data directory" step of the package postinstall script checks whether ${ROOT_INST}/data/tmp is a directory.

If it is, the script runs find "$ROOT_INST/data/tmp"/* -maxdepth 0 -name README -prune -o -print0 | xargs -0 rm -rf

However, if the tmp directory exists and is empty, the find command will exit with an error and a non-zero exit code.

This may cause package installation evaluation to assume that the install failed, resulting in the package manager also exiting with a non-zero exit code.