This is the second half of a post about using Nix to automate a fuzz testing workflow. At this point, I can run honggfuzz against pdftotext, but it takes a bit of manual effort to get things started. I promised in part one that I’d get all of the installation and fuzzing down to a single command. Downloading tricky PDFs In my ad-hoc fuzzing, I manually downloaded a PDF from the IRS website.