Installing unf_ext 0.0.7.2 not working

Question

So when I try running bundle install --without production it tells me that I am getting an error and that I need to Make sure that gem install unf_ext -v

Answer 1

I was having the exact same issue trying to install this specific gem and version as well. Turns out my VPS would run out of RAM while compiling and quit. I just killed off a few processes I could live without for a few minutes and it worked...