[arch-haskell] Links from /usr/share/doc/ghc/html/libraries/index.html not referring to packages

E.g. if I click on Data.Map from /usr/share/doc/ghc/html/libraries/index.html, I get a 404 on /usr/share/doc/ghc/html/libraries/Data-Map.html, because that document actually lives in the "containers" dir under "libraries". It says the name of the package on the right hand side, but that's not part of the URL for some reason. Think this is something with the packaging, or maybe an upstream issue?