Ruby/RVM with @global gem - bundle run fails with `require': cannot load such file — bundler (LoadError)
<p>I study linux for 1 month. While I tried to make all steps from <a href="https://devcenter.heroku.com/articles/heroku-mysql" rel="noreferrer">Migrating from MySQL to Postgres on Heroku</a> I've got an error I could not handle.</p>
<p>When I try to install  the <code>mysqltopostgres</code> gem from source:</p>
<pre><code>$ git clone https://github.com/maxlapshin/mysql2postgres.git
$ cd mysql2postgres
$ bundle install
$ gem build mysqltopostgres.gemspec
$ sudo gem install mysqltopostgres-0.2.20.gem
</code></pre>
<p>I have an error on <code>$ bundle install</code> :</p>
<pre><code>/home/franchb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/
kernel_require.rb:55:in `require': cannot load such file -- bundler (LoadError) 
from /home/franchb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/
kernel_require.rb:55:in `require'
from /usr/bin/bundle:7:in `&lt;main&gt;'
</code></pre>
<p>I've installed <code>sudo apt-get install bundler</code> but when i try enter <code>bundle -v</code> I get the same error!</p>
<p>My <code>gem env</code> is:</p>
<pre><code>RubyGems Environment:
  - RUBYGEMS VERSION: 2.5.1
  - RUBY VERSION: 2.3.0 (2015-12-25 patchlevel 0) [x86_64-linux]
  - INSTALLATION DIRECTORY: /home/franchb/.rvm/gems/ruby-2.3.0@global
  - USER INSTALLATION DIRECTORY: /home/franchb/.gem/ruby/2.3.0
  - RUBY EXECUTABLE: /home/franchb/.rvm/rubies/ruby-2.3.0/bin/ruby
  - EXECUTABLE DIRECTORY: /home/franchb/.rvm/gems/ruby-2.3.0@global/bin
  - SPEC CACHE DIRECTORY: /home/franchb/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /home/franchb/.rvm/rubies/ruby-2.3.0/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /home/franchb/.rvm/gems/ruby-2.3.0@global
  - GEM CONFIGURATION:
     - :update_sources =&gt; true
     - :verbose =&gt; true
     - :backtrace =&gt; false
     - :bulk_threshold =&gt; 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /home/franchb/.rvm/gems/ruby-2.3.0@global/bin
     - /home/franchb/.rvm/rubies/ruby-2.3.0/bin
     - /home/franchb/.rvm/bin
     - /home/franchb/bin
     - /usr/local/sbin
     - /usr/local/bin
     - /usr/sbin
     - /usr/bin
     - /sbin
     - /bin
     - /usr/games
     - /usr/local/games
</code></pre>
<p>My <code>rvm gemset list</code> is</p>
<pre><code>gemsets for ruby-2.3.0 (found in /home/franchb/.rvm/gems/ruby-2.3.0)
   (default)
=&gt; global
   rails230
</code></pre>
<p>My gem list is</p>
<pre><code>*** LOCAL GEMS ***

bigdecimal (1.2.8)
bundler-unload (1.0.2)
did_you_mean (1.0.0)
executable-hooks (1.3.2)
gem-wrappers (1.2.7)
io-console (0.4.5)
json (1.8.3)
minitest (5.8.3)
net-telnet (0.1.1)
power_assert (0.2.6)
psych (2.0.17)
rake (10.4.2)
rdoc (4.2.1)
rubygems-bundler (1.4.4)
rvm (1.11.3.9)
test-unit (3.1.5)
</code></pre>
<p>I use Linux Mint 17.3</p>
<p>Please, help me to understand what goes wrong. I need to install <code>mysqltopostgres</code> to migrate MySQL to Posgres in Heroku.</p>
<p>Thank you!</p>