Adding texlive to default.nix in obelisk project

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Hi!

I’m very much a nix beginner, and have some basic experience using it with an Obelisk project, primarily for installing libraries for haskell.

I now need to install xelatex in my environment, since it’s a dependency for makePDF in Pandoc. Right now running makePDF throws an error saying that “xelatex” was not found.

How would I add this nix package as in my default.nix?
https://nixos.wiki/wiki/TexLive

Here’s a skeleton default.nix for obelisk projects:
https://github.com/obsidiansystems/obelisk/blob/7ad33cbe3e84b209e83c505ce25486445bbd602e/skeleton/default.nix

Thanks!