haskell - Issue installing Snap on macOS Sierra

Question

I'm having trouble installing the Haskell framework Snap on macOS Sierra. Whenever I install it, I get the following message:

Resolving dependencies...
Configuring securemem-0.1.9...
Configuring skein-1.0.9.4...
Configuring configurator-0.3.0.0...
Configuring cryptonite-0.24...
Building configurator-0.3.0.0...
Building securemem-0.1.9...
Building skein-1.0.9.4...
Failed to install configurator-0.3.0.0
Build log ( /Users/nicholas/.cabal/logs/ghc-8.2.1/configurator-0.3.0.0-6dySPcNCURWFswtMXJvzho.log ):
cabal: Entering directory '/tmp/cabal-tmp-66175/configurator-0.3.0.0'
Configuring configurator-0.3.0.0...
Preprocessing library for configurator-0.3.0.0..
Building library for configurator-0.3.0.0..
<command line>: cannot satisfy -package-id attoparsec-0.13.2.0-5dp4kBDsiGY4dQpLKbD5rk: 
    attoparsec-0.13.2.0-5dp4kBDsiGY4dQpLKbD5rk is unusable due to shadowed dependencies:
      scientific-0.3.5.1-L0qYzdp0wpz8rO8gircNSR text-1.2.2.2-EGUst8sqNAZCw1xLPcmcMH
    (use -v for more information)
cabal: Leaving directory '/tmp/cabal-tmp-66175/configurator-0.3.0.0'
Configuring transformers-base-0.4.4...
Building cryptonite-0.24...
Building transformers-base-0.4.4...
Installed securemem-0.1.9
Installed transformers-base-0.4.4
Installed skein-1.0.9.4
Installed cryptonite-0.24
Updating documentation index
/Users/nicholas/Library/Haskell/share/doc/x86_64-osx-ghc-8.2.1/index.html
cabal: Error: some packages failed to install:
configurator-0.3.0.0-6dySPcNCURWFswtMXJvzho failed during the building phase.
The exception was:
ExitFailure 1
snap-1.0.0.2-5CZKyA9EY4oLgkpHYCVfnv depends on snap-1.0.0.2 which failed to
install.

I'm using the Haskell Platform installed using homebrew (brew cask install haskell-platform), and cabal version 2.0.0.2. I have tried using sudo and deleting my ~/.ghc file

Answer 1

There was an issue with full 8.2.1 binary platform builds that's just been resolved: https://mail.haskell.org/pipermail/haskell-cafe/2017-October/127979.html

This was likely an instance of that.

(see also: GHC cannot find libraries on fresh install of Haskell-Platform)