I want to add some haddock support to nix So that you can also install package-haddock-version But I'm struggling. I can tell nix to but all html files into $out/<shared-dir> However this will lead to collisions. Either if a package ships with a dependency itself or if you install different versions. The latter is not a big problem. You can assign priorities to choose the version which will be linked to you nix-profile directory. You'll be using the latest documentation any most of the time, won't you? Is there an easy way to tell haddock to use absolute paths? DepA/interface-dump DepA/*.html DebB/interface-dump DepB/*.html Now I want to create some documentation for C referencing DepA and DepB in DepC/*.html DebC/interface-dump Cat this be done? By now the created files will reference the html file with a relative path. Thus they won't be found unless I put everything into one shared directory (which I'll do for now) Marc