“LastPyMile: Identifying the Discrepancy between Sources and Packages”:https://2021.esec-fse.org/details/fse-2021-papers/61/LastPyMile-Identifying-the-Discrepancy-between-Sources-and-Packages
“Our empirical assessment of 2438 popular packages in PyPI with an analysis of around 10M lines of code shows severaldifferences in the wild […]”—certainly rings a bell to anyone who package #Python, Gems, etc. for #Guix.