workaround un bug de tikz

latex/ystikz.tex

@@ -18,6 +18,37 @@
 \usetikzlibrary{automata}
 \ifluatex
   \usetikzlibrary{graphdrawing}
+  %
+  %% bug de PGF
+  %% https://tex.stackexchange.com/a/453157
+  \usepackage{luacode}
+  \begin{luacode*}
+  
+  function pgf_lookup_and_require(name)
+      local sep = package.config:sub(1,1)
+      local function lookup(name)
+          local sub = name:gsub('%.',sep)  
+          if kpse.find_file(sub, 'lua') then
+              require(name)
+          elseif kpse.find_file(sub, 'clua') then
+              collectgarbage('stop') 
+              require(name)
+              collectgarbage('restart')
+          else
+              return false
+          end
+          return true
+      end
+      return
+          lookup('pgf.gd.' .. name .. '.library') or
+          lookup('pgf.gd.' .. name) or
+          lookup(name .. '.library') or
+          lookup(name) 
+  end
+  
+  \end{luacode*}
+  %
+  %
   \usegdlibrary{layered, force}
 \fi