Hello Philip, > The attoparsec package on hackage defines multiple internal libraries inside one package, named "attoparsec" and "attoparsec-internal", with the first depending on the latter. Importing attoparsec using `guix import hackage attoparsec` therefore yields the following erroneous package definition: […] attached patches should fix this. I tried them with both, attoparsec and raaz, and internal libraries appear neither in inputs nor native inputs any more. Cheers, Lars