Preprocessing executable 'test' for b-1.0..
Building executable 'test' for b-1.0..
[1 of 2] Compiling B                ( B.hs, dist/build/test/test-tmp/B.o ) [A changed]
[2 of 2] Compiling Main             ( Main.hs, dist/build/test/test-tmp/Main.o ) [B changed]
Linking dist/build/test/test ...