Resolving dependencies... Configuring generics-eot-0.2... Building generics-eot-0.2... Failed to install generics-eot-0.2 Build log ( /home/builder/.cabal/logs/generics-eot-0.2.log ): cabal: Entering directory '/tmp/cabal-tmp-17784/generics-eot-0.2' Configuring generics-eot-0.2... Building generics-eot-0.2... Preprocessing library generics-eot-0.2... ghc: could not execute: markdown-unlit cabal: Leaving directory '/tmp/cabal-tmp-17784/generics-eot-0.2' cabal: Error: some packages failed to install: generics-eot-0.2 failed during the building phase. The exception was: ExitFailure 1