@Foxboron @zacchiro @Zimm_i48 On the question of the different ecosystems ingested by nixpkgs, we discuss in our RQ2 the disparities in reproducibility rates in function of ecosystem of provenance: we indeed remark that some large ecosystems (like Python for example) have excellent reproducibility rate and contribute positively in the overall nixpkgs reproducibility rate. On the other hand Haskell for example is also one of the largest ecosystem in nixpkgs and has 1/2