<!-- Have you read OpenSCISSOR Code of Conduct? By filing an Issue, you are expected to comply with it, including treating everyone with respect: https://github.com/scissor-project/open-scissor/blob/master/.github/CODE_OF_CONDUCT.md --> ### Prerequisites * [x] Put an X between the brackets on this line if you have done all of the following: * Checked that your issue isn't already filed: https://github.com/scissor-project/open-scissor/issues ### Description Package installation should be combined in a single layer so we don't have to repeat the cleanup steps.