[Haskell] Linking Multiple Versions of the Same Package

I tried doing this out of curiosity. Package B links to version 0.1 of open-witness, while package C links to B and version 0.1.1 of open-witness. Cabal stopped me when doing "cabal configure" in C: $ cabal configure Configuring C-0.1... Warning: This package indirectly depends on multiple versions of the same package. This is highly likely to cause a compile failure. package B-0.1 requires open-witness-0.1 package C-0.1 requires open-witness-0.1.1 It appears the issue is that package versions are not recorded in External Core names. Thus