Hey all! We are trying to do site previews with Netlfiy for PR’s and we are using a new build framework called Franklin.jl. This requires the Julia Programming Language to be installed on the server. Julia can be installed by doing brew cask install julia but it seems that brew does not work for the build command.
Any ideas to get this to work?
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Hi, @logankilpatrick, and welcome to the Netlify community site. 
The build image is Ubuntu Linux and brew is a MacOS command so it won’t work on our build image. However, you probably can install Julia in the build image with other commands.
While you cannot sudo, it should be possible to adapt the instructions found at the URL below to install Julia in the build image:
If you want Julia to be included in our build image by default (so you don’t have to install it manually), you can enter that as a feature request here (as this is a public repo):
If there are other questions about this, please let us know.