7 Jul
2014
7 Jul
'14
10:04 a.m.
Also note that this behaviour is not specific to 7.8.*, it is also present in 7.6.3. The only thing you can to with both version of transformers installed is to just do:
ghci -package ghc -hide-package transformers-0.4.1.0 A.hs
Or, perhaps better:
ghci -package ghc -package transformer-0.3.0.0 A.hs
Which works for ghc 7.8.2, but for some reason not for ghc 7.6.3. Maybe because in 7.8.2, transformers-0.3.0.0 is in the global package database (bundled with GHC), while that is not the case for 7.6.3? -- Christiaan