scribusUnstable: Fix build with Poppler 0.83

Another fallout from https://github.com/NixOS/nixpkgs/pull/74558

pkgs/applications/office/scribus/unstable.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, mkDerivation, pkgconfig, cmake, qtbase, cairo, pixman,
+{ stdenv, fetchurl, fetchpatch, mkDerivation, pkgconfig, cmake, qtbase, cairo, pixman,
 boost, cups, fontconfig, freetype, hunspell, libjpeg, libtiff, libxml2, lcms2,
 podofo, poppler, poppler_data, python2, qtimageformats, qttools, harfbuzzFull }:
 
@@ -14,6 +14,19 @@ mkDerivation rec {
     sha256 = "eQiyGmzoQyafWM7fX495GJMlfmIBzOX73ccNrKL+P3E=";
   };
 
+  patches = [
+    # fix build with Poppler 0.82
+    (fetchpatch {
+      url = "https://github.com/scribusproject/scribus/commit/6db15ec1af791377b28981601f8c296006de3c6f.patch";
+      sha256 = "1y6g3avmsmiyaj8xry1syaz8sfznsavh6l2rp13pj2bwsxfcf939";
+    })
+    # fix build with Poppler 0.83
+    (fetchpatch {
+      url = "https://github.com/scribusproject/scribus/commit/b51c2bab4d57d685f96d427d6816bdd4ecfb4674.patch";
+      sha256 = "031yy9ylzksczfnpcc4glfccz025sn47zg6fqqzjnqqrc16bgdlx";
+    })
+  ];
+
   enableParallelBuilding = true;
 
   nativeBuildInputs = [ pkgconfig cmake  ];