Static Library ( --app:staticlib) fails on macOS

[emg]

Hi,

I'm trying to create a static-lib from a nim source so that I can use it in my 
other C projects. But, static-lib creation fails in macOS. Using version 0.17.2.

Here's the command- 
    
    
    nim cc -d:release --header --noMain  --app:staticlib test.nim
    

It gives the error 
    
    
    sh: llvm-ar: command not found
    Error: execution of an external program failed: 'llvm-ar rcs libtest.a ...
    

But if replace 
    
    
     llvm-ar 

with just 
    
    
     ar 

and run the command myself manually, the static lib is created as expected.