#474: cabal-install needlessly reinstalls an existing package ---------------------------------+------------------------------------------ Reporter: judah | Owner: Type: defect | Status: new Priority: normal | Milestone: Component: cabal-install tool | Version: 1.6.0.1 Severity: normal | Resolution: Keywords: | Difficulty: unknown Ghcversion: | Platform: ---------------------------------+------------------------------------------ Comment (by duncan): Yes you're quite right. I can reproduce it. It's not the same as #470 though it does lead to that situation as you say. So we pick Cabal and then process. We have not committed to picking the installed version of either yet. We end up picking the highest version of process. That then forces the choice of Cabal, we have to pick the available version because the installed version uses an older version of process. We already try to pick the installed versions of packages however that heuristic is not enough here because there are multiple installed versions of process. To pick between them we should pick the one that would let us use the installed version of another package that we have already picked where we still have the choice of installed or available. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/474#comment:4 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects