FewDee is an incomplete, experimental, mostly 2D, library focused on gamesprototyping.
It's intresting. Do you have any game prototype? It will be intresting to see FewDee usage.
About build system - you can use dub: https://github.com/rejectedsoftware/dub It's really simple.Also, can you publish Allegro library bindings for D to the Deimos:
https://github.com/D-Programming-Deimos It can be useful for another projects.