Perhaps as a diagnostic for the custom build type, cabal should check
#376: Allow constraint on using installed package versions ---------------------------------+------------------------------------------ Reporter: duncan | Owner: Type: enhancement | Status: new Priority: normal | Milestone: Component: cabal-install tool | Version: HEAD Severity: normal | Resolution: Keywords: | Difficulty: normal Ghcversion: 6.8.3 | Platform: ---------------------------------+------------------------------------------ Comment (by duncan): Replying to [comment:2 duncan]: that the registered package is actually consistent with the info in the .cabal file. Note that this would frequently flag up packages built using franchise because it does not believe in specifying package deps. Rather it beleives in discovering required modules and at configure time discovering which packages provide those modules. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/376#comment:3 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects