diff --git a/.travis.yml b/.travis.yml
index c58e74e..4c060ab 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,11 +18,10 @@ before_install:
 - chmod 600 ~/.ssh/id_rsa
 - echo -e "[zeus.ugent.be]:2222 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBC87/Q3H8f7ghmA+iCtKGaNyk0fx3Z36Xrn+eGv8a4pD7MXeu6Uwr0aN5HnkcbRWXFtMwnAU3ptoP90vH7qu99w=\n[herbert.ugent.be]:2222 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGLnJMh2DgqpVnHxOmeV6KffvzZGEVfniq0NFHRGZoL4f7Uc8xeG9gn3cc7lCL02F9LwWZNwR4gSqhGt/RK2S54=\n[git.zeus.gent]:2222 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGLnJMh2DgqpVnHxOmeV6KffvzZGEVfniq0NFHRGZoL4f7Uc8xeG9gn3cc7lCL02F9LwWZNwR4gSqhGt/RK2S54=\n" >> ~/.ssh/known_hosts
 - git submodule update --init --recursive --remote
-- nix-shell
-- bundle install --without=development,nanoc
+- nix-shell --run 'bundle install --without=development,nanoc'
 script:
-- bundle exec nanoc --env=prod
-- bundle exec nanoc --env=prod check --deploy
+- nix-shell --run 'bundle exec nanoc --env=prod'
+- nix-shell --run 'bundle exec nanoc --env=prod check --deploy'
 after_success:
 - chmod +x ./deploy.sh
-- ./deploy.sh
+- nix-shell --run './deploy.sh'