Problem: Build single component doesn't work
Problem: Build single component doesn't work

Solution: expose the lower level attributes so they
may be accessed from the command line. (i.e.)

$ nix-build -A components.maths_boolean_nand

dmichiels/fractalide,dmichiels/fractalide,sjmackenzie/fractalide,fractalide/fractalide,sjmackenzie/fractalide,fractalide/fractalide,dmichiels/fractalide,fractalide/fractalide,sjmackenzie/fractalide