diff --git a/.travis.yml b/.travis.yml
index 4921155..cf2e10f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,19 +18,19 @@ before_install:
   - sudo apt-get update
   # Install Chef Solo prerequisites.
   - sudo apt-get install ruby ruby-dev libopenssl-ruby rdoc ri irb build-essential ssl-cert
-  # Install Chef Solo.
-  # Chef Solo 11.4.4 is broken, so install a previous version.
-  # The bug is planned to be fixed in 11.4.5 which haven't been released yet.
-  - sudo gem install --version '<11.4.4' chef --no-rdoc --no-ri
 
 install:
   - sudo hostname localhost
+  # Install Chef Solo.
+  # Chef Solo 11.4.4 is broken, so install a previous version.
+  # The bug is planned to be fixed in 11.4.5 which haven't been released yet.
+  - gem install --version '<11.4.4' chef --no-rdoc --no-ri
   # Make sure the target directory for cookbooks exists.
   - mkdir -p /tmp/chef-solo
   # Prepare a file with runlist for Chef Solo.
   - echo '{"cubrid":{"version":"'$CUBRID_VERSION'"},"run_list":["cubrid::demodb"]}' > cubrid_chef.json
   # Install CUBRID via Chef Solo. Download all cookbooks from a remote URL.
-  - sudo chef-solo -c test/testSetup/solo.rb -j cubrid_chef.json -r http://sourceforge.net/projects/cubrid/files/CUBRID-Demo-Virtual-Machines/Vagrant/chef-cookbooks.tar.gz/download
+  - sudo $(which chef-solo) -c test/testSetup/solo.rb -j cubrid_chef.json -r http://sourceforge.net/projects/cubrid/files/CUBRID-Demo-Virtual-Machines/Vagrant/chef-cookbooks.tar.gz/download
 
 after_success:
   # Install JSCoverage prerequisites.