[1 of 2] Processing h
  [1 of 1] Compiling H[sig]           ( h/H.hsig, nothing )
[2 of 2] Processing p
  [1 of 3] Compiling B                ( p/B.hs, nothing )
  [2 of 3] Compiling H[sig]           ( p/H.hsig, nothing )
  [3 of 3] Compiling A                ( p/A.hs, nothing )