[1 of 3] Processing p
  [1 of 1] Compiling A[sig]           ( p/A.hsig, nothing )
[2 of 3] Processing q
  [1 of 1] Compiling B[sig]           ( q/B.hsig, nothing )
[3 of 3] Processing r
  [1 of 2] Compiling C[sig]           ( r/C.hsig, nothing )
  [2 of 2] Compiling M                ( r/M.hs, nothing )