~/spool/invalicabile/cavazzo (master *%)$ cabal run
Warning: this is a debug build of cabal-install with assertions enabled.
Configuration is affected by the following files:
- cabal.project
cavazzo: Data.Binary.Get.runGet at position 4: Invalid magic number
CallStack (from HasCallStack):
  error, called at src/Data/Binary/Get.hs:345:5 in binary-0.8.9.3-64bfb09960c5f9cce507726b6d06443aa2d73733c122a9f5188a487a84e84e02:Data.Binary.Get
HasCallStack backtrace:
  collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:92:13 in ghc-internal:GHC.Internal.Exception
  toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:128:3 in ghc-internal:GHC.Internal.Exception