Using Chilkat with Bundler

[Chilkat]

Specifically, I can use the Ruby 2.0 version for Mac (it works very well), but when I try to do a 'bundle install' with the 1.9.3 64-bit version for Linux, Bundler complains that we need Ruby 2.4.

We deploy this (older) app on Centos using Ruby 1.9.3, and moving the app to a newer version of Ruby would be quite painful.

Am I doing something wrong with the 1.9.3 version?

[Chilkat]

We are putting the  9.5.0.69 version into vendor/cache and forcing bundler to use it via the line

gem 'chilkat', '=9.5.0.69'

in ./Gemfile.

Then, we are getting the following error:

Bundler could not find compatible versions for gem "ruby":
  In Gemfile:
    ruby

    chilkat (= 9.5.0.69) was resolved to 9.5.0.69, which depends on
      ruby (~> 2.4)

[Chilkat]

Ah, I finally put the following in the Gemfile:

gem 'chilkat', '=9.5.0.69', :path => "vendor/cache"

and that did the trick.  Funny, I always thought that Bundler looks in vendor/cache by default, but apparently not.