Nim Devel - how to (re-) build it?

[HJarausch]

Recently, I cannot rebuild Nim devel from source any more (on my Gentoo Linux 
system).

I get this error
    
    
    getDocHacksJs: cmd: /usr/bin/nim js -d:release 
/usr/tools/dochack/dochack.nim
    
    oserr.nim(94)            raiseOSError
    
    Error: unhandled exception: No such file or directory
    
    
    Run

What can I do about this?

Thanks for a hint, Helmut