Resolving dependencies...
Configuring Dao-0.0.0.0...
Building Dao-0.0.0.0...
Failed to install Dao-0.0.0.0
Build log ( /home/builder/.cabal/logs/Dao-0.0.0.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-14818/Dao-0.0.0.0'
Configuring Dao-0.0.0.0...
Building Dao-0.0.0.0...
Preprocessing executable 'dao' for Dao-0.0.0.0...
Module imports form a cycle:
  module ‘Dao’ (Main.hs) imports itself
cabal: Leaving directory '/tmp/cabal-tmp-14818/Dao-0.0.0.0'
cabal: Error: some packages failed to install:
Dao-0.0.0.0 failed during the building phase. The exception was:
ExitFailure 1