frontend service build fails

[acostach]

Build log:

[Info]      Building on arm06
[Info]      Pulling previous images for caching purposes...
[Success]   Successfully pulled cache images
[Info]      Starting to build proxy
[Info]      Starting to build frontend
[Info]      Starting to build data
[Success]   Successfully built service proxy
[Success]   Successfully built service data
[Info]      Uploading images
[Success]   Successfully uploaded images
[Error]     Some services failed to build:
[Error]       Service: frontend
[Error]         Error: The command '/bin/sh -c mkdir -p static/js &&     wget "https://code.jquery.com/jquery-${JQUERY_VERSION}.min.js" -O static/js/jquery.min.js &&     wget "https://code.highcharts.com/${HIGHCHARTS_VERSION}/highcharts.js" -O static/js/highcharts.js &&     wget "http://requirejs.org/docs/release/${REQUIREJS_VERSION}/minified/require.js" -O static/js/require.js' returned a non-zero code: 5
[Info]      Built on arm06
[Error]     Not deploying release.

Steps to reproduce:
Open browser and navigate to: https://dashboard.balena-<cloud/staging>.com/deploy?repoUrl=https://github.com/balena-io-examples/multicontainer-getting-started