Defining variable in nim.cfg

[c0ntribut0r]

Hello, I have a long compilation command like this:
    
    
    nim c -r -o=../build -d:myUglyVariable:"myUglyValue" main.nim 
--loglevel=DEBUG
    

I'd like to move all that in nim.cfg, or at least that ugly variable, so that I 
type just 
    
    
    nim c -r main.nim
    

Is that possible? I really lack any docs on nim.cfg file syntax.