Global install newer yarn

.travis.yml

@@ -27,6 +27,7 @@ before_install:
   - sudo apt-get -qq update
   - sudo apt-get install wine1.6 # this is for building windows electron images
 install:
+- sudo npm install -g yarn
 - mkdir ~/geckodriver_$GECKODRIVER_VERSION;
 - wget -O - https://github.com/mozilla/geckodriver/releases/download/v0.19.1/geckodriver-v$GECKODRIVER_VERSION-linux64.tar.gz | tar -xzf - -C ~/geckodriver_$GECKODRIVER_VERSION;
 - export PATH=$PATH:$HOME/geckodriver_$GECKODRIVER_VERSION

website/deploy.sh

@@ -7,8 +7,8 @@ RELEASE_VERSION=`node -e 'require("fs").readFile("package.json", (e,d)=>console.
 set -e
 set -x
 cd ${0%/*}
-npx yarn
-npx yarn build
+yarn
+yarn build
 ln -sf ../code/JBrowse-$RELEASE_VERSION/dist build/jbrowse/docs/dist
 openssl aes-256-cbc -K $encrypted_a33f2fb5219d_key -iv $encrypted_a33f2fb5219d_iv -in deploy.pem.enc -out deploy.pem -d
 chmod 600 deploy.pem