Errore di stack

reddit-bot-0.1.0.0: configure
Configuring reddit-bot-0.1.0.0...
reddit-bot-0.1.0.0: build
Preprocessing library reddit-bot-0.1.0.0...
[1 of 1] Compiling Lib              ( src/Lib.hs, .stack-work/dist/x86_64-linux/Cabal-1.24.0.0/build/Lib.o )

/home/vitalij/Documenti/spazi_lavoro/stack/reddit-bot/src/Lib.hs:5:1: error:
    Failed to load interface for ‘Database.MySQL.Simple’
    Use -v to see a list of the files searched for.

--  While building package reddit-bot-0.1.0.0 using:
      /home/vitalij/.stack/setup-exe-cache/x86_64-linux/setup-Simple-Cabal-1.24.0.0-ghc-8.0.1 --builddir=.stack-work/dist/x86_64-linux/Cabal-1.24.0.0 build lib:reddit-bot exe:reddit-bot-exe --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1