Hey in case you are happy user of Mac Os, you might face the
"readlink --f unrecognized option" problem. This command is originally works on unix based systems, but on bsd it won't work. For mac users who use brew this can be easily fixed by next steps :
brew install coreutils
ln -s /usr/local/bin/greadlink /usr/bin/readlink
That's it . Now you should not get such errors any more.