I have an R shiny app that allows for the rendering and download of pdfs using Rmarkdown and tinytex. The .Rmd files use several LaTeX packages, one of which (digsig) is not available in the default tinytex repository. On my personal computer, I manually installed the digsig.sty file into my tinytex library. However, this shinyapp is being uploaded to RConnect via the RStudio publishing tool, and so this is not possible in “deployment”.