[1 of 3] Compiling A                ( A.hs, nothing )
[2 of 3] Compiling B                ( B.hs, nothing )
[3 of 3] Compiling Main             ( C.hs, nothing )
Middle
End
[2 of 3] Compiling B                ( B.hs, nothing )
[3 of 3] Compiling Main             ( C.hs, nothing ) [B changed]