diff --git a/pkgs/development/libraries/librdf/raptor2.nix b/pkgs/development/libraries/librdf/raptor2.nix
index 656558146857..e290aa2b743c 100644
--- a/pkgs/development/libraries/librdf/raptor2.nix
+++ b/pkgs/development/libraries/librdf/raptor2.nix
@@ -1,26 +1,28 @@
-{ lib, stdenv, fetchurl, libxml2, libxslt }:
+{ lib, stdenv, libxml2, libxslt, pkg-config, cmake, fetchFromGitHub, perl, bison, flex, fetchpatch }:
 
 stdenv.mkDerivation rec {
   pname = "raptor2";
-  version = "2.0.15";
+  version = "unstable-2022-06-06";
 
-  src = fetchurl {
-    url = "http://download.librdf.org/source/${pname}-${version}.tar.gz";
-    sha256 = "ada7f0ba54787b33485d090d3d2680533520cd4426d2f7fb4782dd4a6a1480ed";
+  src = fetchFromGitHub {
+    owner = "dajobe";
+    repo = "raptor";
+    rev = "3cca62a33da68143b687c9e486eefc7c7cbb4586";
+    sha256 = "sha256-h03IyFH1GHPqajfHBBTb19lCEu+VXzQLGC1wiEGVvgY=";
   };
 
   patches = [
-    (fetchurl {
-      name = "CVE-2017-18926.patch";
-      url = "https://github.com/dajobe/raptor/commit/590681e546cd9aa18d57dc2ea1858cb734a3863f.patch";
-      sha256 = "1qlpb5rm3j2yi0x6zgdi5apymg5zlvwq3g1zl417gkjrlvxmndgp";
+    # https://github.com/dajobe/raptor/pull/52
+    (fetchpatch {
+      name = "fix-cmake-generated-pc-file";
+      url = "https://github.com/dajobe/raptor/commit/fa1ef9a27d8762f5588ac2e92554a188e73dee9f.diff";
+      sha256 = "sha256-zXIbrYGgC9oTpiD0WUikT4vRdc9b6bsyfnDkwUSlqao=";
     })
   ];
 
+  nativeBuildInputs = [ pkg-config cmake perl bison flex ];
   buildInputs = [ libxml2 libxslt ];
 
-  postInstall = "rm -rvf $out/share/gtk-doc";
-
   meta = {
     description = "The RDF Parser Toolkit";
     homepage = "https://librdf.org/raptor";