The gem fails to find a proper binary for my 32 bit Debian server.

The problem is that RbConfig::CONFIG['host_cpu'] reports i486, while uname -m gives me i686.

I guess that RbConfig::CONFIG['host_cpu'] reports the compile configuration of Ruby, not the actual platform. It also will report a 32 bit architecture if you run a 32 bit ruby binary on a 64 bit platform.

I'm not sure if there's a proper way to detect the architecture of the actual platform ruby is running on instead of what it was compiled for (https://github.com/rdp/os does not do this either). Of course one could invoke a shell and ask e. g. uname, but...

The easiest fix would be to install the i686 version of phantom even if RbConfig::CONFIG['host_cpu'] reports i486. The probability of running on an actual i486 or Pentium should be quite low. You could give a warning in that situation. Would be nicer than just giving up.

I can prepare a PR if we agree on a solution for this.