Tried to use buildcraft on my server and locally.
Seems to partially work, but I don't get the factory receipes, therefore I get no steel and so I can't do much at all.

Startup logs of my server: https://gist.github.com/NobodysNightmare/30b61d58c6eefbccdce8518aa479eeff

Factory module is enabled and seems to do stuff:

[19:32:32] [Server thread/INFO] [railcraft]: Module performing stage PRE_INIT: railcraft:factory +
[19:32:32] [Server thread/INFO] [railcraft]: Block registered: class mods.railcraft.common.blocks.anvil.BlockRCAnvil, railcraft:anvil
[19:32:32] [Server thread/INFO] [railcraft]: Item registered: class mods.railcraft.common.items.ItemCoke, railcraft:fuel_coke
[19:32:32] [Server thread/INFO] [railcraft]: Module performing stage PRE_INIT: railcraft:magic +

Any clue? I could not find any additional prerequisites for that module. Also no other way to obtain steel without it.

Hey sorry...

After reading the latest Blog post I realized that this is indeed intentional. Yesterday I only searched in the change log and the wiki.

Looking forward to the completed version :)