how can be compile nim by nvc compiler?

[physicphy]

i tried this
    
    
    nim c --cc:nvc -r ~/workspace/nim_test/nvc_test.nim
    
    
    Run

then i met this error

how can i use nvc??
    
    
    command line(1, 2) Error: unknown C compiler: 'nvc'. Available options are: 
gcc, switch_gcc, llvm_gcc, clang, bcc, vcc, tcc, env, icl, icc, clang_cl
    
    
    Run