DJ
Graphics/SOE/Gtk.hs:94:18: Could not find module `System.Time' It is a member of the hidden package `old-time-1.1.0.1'. Perhaps you need to add `old-time' to the build-depends in your .cabal file.
That is actually all you have to do: in the cabal file of your package you have either a 'library' section or an 'executable' section. These should have a field 'build-depends' simply add 'old-time >= 1.1 && < 1.2' their. See for example the cabal file of the lens package: https://github.com/ekmett/lens/blob/master/lens.cabal If you don't have a cabal file you can initialize one via 'cabal init' or simply install the package in the sandbox via running 'cabal install old-time-1.1' in your sandbox, i.e. the directory you ran 'cabal sandbox init' beforehand. Regards Thomas.