try to install yarn

.gitlab-ci.yml

 stages:
   - github-sync
+  - package
   - build
   - test
   - pages
-  - package
   - prerelease
   - release
 

release/arch/linux/build-lin.sh

@@ -19,9 +19,9 @@ fi
 # -
 # Parameters:
 install_yarn() {
-  curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
-  echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
-  sudo apt-get update && sudo apt-get install yarn
+  curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
+  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
+  apt-get update && apt-get install yarn
 }
 # Copy nw.js compiled module released library to node libraries.
 # -