using Catalyst, Graphviz_jll 

rn = @reaction_network begin
    α, S + I --> 2I
    β, I --> R
    S^2, R --> 0
end α β

# check can make a graph
gr = Graph(rn)

# check can save a graph
fname = Base.Filesystem.tempname()
savegraph(gr, "$fname.svg", "svg")

# this are broken in the jll, see
# https://github.com/JuliaPackaging/Yggdrasil/issues/1428
# savegraph(gr, "$fname.pdf", "pdf")
# savegraph(gr, "$fname.png", "png")

