Error when executing "cabal install hoogle"

Question

When I run cabal install hoogle, I get the following:

setup: The program happy version >=1.17 is required but it could not be found
cabal: Error: some packages failed to install
haskell-src-exts-1.13.3 failed during the configure step the exeption is ExitFailure 1

$ghc -V
The Glorious Glasgow Haskell Compilation System, version 7.4.1

How to fix such a problem?

score 8 · Accepted Answer · edited Mar 22 '17 at 13:13

8

Instead of cabal install hoogle, run cabal install alex happy && cabal install hoogle.

Many packages on hackage require alex and happy, so it is good idea to install them after cabal update.

edited Mar 22 '17 at 13:13

nbro

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answered Aug 01 '12 at 07:20

permeakra

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score 2 · Answer 2 · answered May 21 '14 at 20:45

I had lot's of trouble installing hoogle locally. Adding the cabal binary directory, ~/.cabal/bin to my PATH with

export PATH=$PATH:~/.cabal/bin

ended up essentially fixing my problem. After that, just follow the errors and install anything that cabal barks about missing, including alex and happy.

Error when executing "cabal install hoogle"

2 Answers2