is it posible to compile individual module separately?

[bokuno_D]

i want to compile individual module that are required to compile 
the main module.
i just start learning D yeserday, i tried to compile serve-D LSP 
tobe used with SublimeLSP.
i run "dub build" on it. but OOM kill the compiler.
-
is there a way to reduce memory consumtion of the compiler?
or maybe third party tool? alternative to dub?