% cabal install lens
Resolving dependencies...
Configuring adjunctions-4.3...
Building adjunctions-4.3...
Failed to install adjunctions-4.3
Build log ( /home/joel/.cabal/logs/ghc-8.2.2/adjunctions-4.3-9KG4O5bCu1C4kjDRXbfzrB.log ):
cabal: Entering directory '/tmp/cabal-tmp-12040/adjunctions-4.3'
Configuring adjunctions-4.3...
Preprocessing library for adjunctions-4.3..
Building library for adjunctions-4.3..
[ 1 of 11] Compiling Control.Monad.Trans.Conts ( src/Control/Monad/Trans/Conts.hs, dist/build/Control/Monad/Trans/Conts.o )

src/Control/Monad/Trans/Conts.hs:39:1: error:
    Could not find module ‘Control.Comonad’
    There are files missing in the ‘comonad-5.0.2’ package,
    try running 'ghc-pkg check'.
    Use -v to see a list of the files searched for.
   |
39 | import Control.Comonad
   | ^^^^^^^^^^^^^^^^^^^^^^

src/Control/Monad/Trans/Conts.hs:42:1: error:
    Could not find module ‘Data.Functor.Apply’
    There are files missing in the ‘semigroupoids-5.2.1’ package,
    try running 'ghc-pkg check'.
    Use -v to see a list of the files searched for.
   |
42 | import Data.Functor.Apply
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-12040/adjunctions-4.3'
cabal: Error: some packages failed to install:
adjunctions-4.3-9KG4O5bCu1C4kjDRXbfzrB failed during the building phase. The
exception was:
ExitFailure 1
kan-extensions-5.0.2-5wPgaLmqCIA5nX0r07ntuu depends on kan-extensions-5.0.2
which failed to install.
lens-4.15.4-APmzemzgFiN7xUR3yfgasd depends on lens-4.15.4 which failed to
install.