diff --git a/pkgs/games/openclonk/default.nix b/pkgs/games/openclonk/default.nix
index 4b526975349b..2249ab213a22 100644
--- a/pkgs/games/openclonk/default.nix
+++ b/pkgs/games/openclonk/default.nix
@@ -1,6 +1,6 @@
-{ lib, stdenv, fetchurl, cmake, pkg-config
+{ lib, stdenv, fetchurl, fetchDebianPatch, fetchpatch, cmake, pkg-config
 , SDL2, libvorbis, libogg, libjpeg, libpng, freetype, glew, tinyxml, openal
-, freealut, readline, gcc-unwrapped
+, freealut, readline, libb2, gcc-unwrapped
 , enableSoundtrack ? false # Enable the "Open Clonk Soundtrack - Explorers Journey" by David Oerther
 }:
 
@@ -18,6 +18,21 @@ in stdenv.mkDerivation rec {
     sha256 = "0imkqjp8lww5p0cnqf4k4mb2v682mnsas63qmiz17rspakr7fxik";
   };
 
+  patches = [
+    (fetchDebianPatch {
+      pname = "openclonk";
+      version = "8.1";
+      debianRevision = "3";
+      patch = "system-libb2.patch";
+      hash = "sha256-zuH6zxSQXRhnt75092Xwb6XYv8UG391E5Arbnr7ApiI=";
+    })
+    (fetchpatch {
+      name = "fix-gcc-11-build.patch";
+      url = "https://github.com/openclonk/openclonk/commit/e304efde2c8643bbc0fc1ad5e85024982744b233.patch";
+      hash = "sha256-jfVCgeZuYo4x53zhljKcnMDMIBECTRsUSxkl6JaL6HA=";
+    })
+  ];
+
   postInstall = ''
     mv -v $out/games/openclonk $out/bin/
   '' + lib.optionalString enableSoundtrack ''
@@ -28,7 +43,7 @@ in stdenv.mkDerivation rec {
 
   buildInputs = [
     SDL2 libvorbis libogg libjpeg libpng freetype glew tinyxml openal freealut
-    readline
+    readline libb2
   ];
 
   cmakeFlags = [ "-DCMAKE_AR=${gcc-unwrapped}/bin/gcc-ar" "-DCMAKE_RANLIB=${gcc-unwrapped}/bin/gcc-ranlib" ];
@@ -39,8 +54,8 @@ in stdenv.mkDerivation rec {
     description = "Free multiplayer action game in which you control clonks, small but witty and nimble humanoid beings";
     homepage = "https://www.openclonk.org";
     license = if enableSoundtrack then licenses.unfreeRedistributable else licenses.isc;
+    mainProgram = "openclonk";
     maintainers = with maintainers; [ lheckemann ];
     platforms = [ "x86_64-linux" "i686-linux" ];
-    broken = true;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e59de08224d3..31beac08fdca 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -38119,7 +38119,7 @@ with pkgs;
 
   openlierox = callPackage ../games/openlierox { };
 
-  openclonk = callPackage ../games/openclonk { stdenv = gcc10StdenvCompat; };
+  openclonk = callPackage ../games/openclonk { };
 
   openjk = callPackage ../games/openjk { };