inkscape: fix build

pkgs/applications/graphics/inkscape/default.nix

@@ -64,6 +64,9 @@ stdenv.mkDerivation rec {
     rm "$out/share/icons/hicolor/icon-theme.cache"
   '';
 
+  # 0.92.3 complains about an invalid conversion from const char * to char *
+  NIX_CFLAGS_COMPILE = " -fpermissive ";
+
   meta = with lib; {
     license = "GPL";
     homepage = https://www.inkscape.org;

pkgs/top-level/all-packages.nix

@@ -16413,6 +16413,7 @@ with pkgs;
 
   inkscape = callPackage ../applications/graphics/inkscape {
     lcms = lcms2;
+    poppler = poppler_0_61;
   };
 
   inspectrum = libsForQt5.callPackage ../applications/misc/inspectrum { };