Resolving dependencies... Configuring ampersand-3.0.1... Failed to install ampersand-3.0.1 Build log ( /home/builder/.cabal/logs/ampersand-3.0.1.log ): cabal: Entering directory '/tmp/cabal-tmp-12622/ampersand-3.0.1' cabal: Leaving directory '/tmp/cabal-tmp-12622/ampersand-3.0.1' cabal: Error: some packages failed to install: ampersand-3.0.1 failed during the configure step. The exception was: user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error: /tmp/cabal-tmp-12622/ampersand-3.0.1/dist/setup/setup.hs:13:1: error: Failed to load interface for ‘System.Locale’ Use -v to see a list of the files searched for. )