Doesn't work with the new huskell

[devenv]

src/Control/Lens/Internal/Exception.hs:165:3:
‘typeOf’ is not a (visible) method of class ‘Typeable’

src/Control/Lens/Internal/Exception.hs:168:14:
‘typeOf’ is not a (visible) method of class ‘Typeable’
Failed to install lens-3.10.3

ghc 7.8.3

[Noeda]

New development is happening in the modernize branch of Dfterm3, which does compile on GHC 7.8.3 just fine (in fact, older versions might not). This is why I don't think I'm going to fix this one.

However, the new branch is not in a usable state so I think your only option right now is to get a GHC from 7.6 series and use that. Dfterm3 does not see active development anymore.

I'll leave this open so that the defect is documented, at the very least.