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cabal install Yi

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src/Graphics/Vty.hs:30:18:
    Could not find module `System.Console.Terminfo':
      There are files missing in the `terminfo-0.3.1.3' package,
      try running 'ghc-pkg check'.
      Use -v to see a list of the files searched for.

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Resolving dependencies...
cabal: constraints conflict: top level constraint terminfo ==0.3.2.2 however
terminfo-0.3.2.2 was excluded because of the top level dependency terminfo
==0.3.1.3

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No packages to be installed.
All the requested packages are already installed.
If you want to reinstall anyway then use the --reinstall flag. 

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ghc-pkg check 2>&1 | grep 'There are problems'
or for the awker:
ghc-pkg check 2>&1 | awk '/There are problems/'

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ghc-pkg check 2>&1 | grep 'There are problems' | cut -d' ' -f6
or
ghc-pkg check 2>&1 | awk '/There are problems/ { print $6 } '

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uniq <( for i in  $(ghc-pkg check 2>&1 | grep 'There are problems' | cut -d' ' -f6 ); do echo ${i%-*};  done)

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cabal install $(uniq <( for i in  $(ghc-pkg check 2>&1 | grep 'There are problems' | cut -d' ' -f6 ); do echo ${i%-*}; done)) --reinstall

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cabal install $(ghc-pkg check --simple-output) --reinstall

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for i in $(ghc-pkg check --simple-output); do ghc-pkg unregister $i; done