Merge pull request #316941 from b-rodrigues/fix_grafgen

rPackages.GrafGen: fixed build

pkgs/development/r-modules/default.nix

@@ -659,6 +659,7 @@ let
     Rsymphony = with pkgs; [ symphony doxygen graphviz subversion cgl clp];
     tcltk2 = with pkgs; [ tcl tk ];
     rswipl = with pkgs; [ ncurses.dev libxcrypt zlib.dev ];
+    GrafGen = [ pkgs.zlib ];
     tikzDevice = with pkgs; [ which texliveMedium ];
     gridGraphics = [ pkgs.which ];
     adimpro = with pkgs; [ which xorg.xdpyinfo ];