kvazaar: Fix build on FreeBSD (#384458)

pkgs/by-name/kv/kvazaar/package.nix

@@ -1,6 +1,7 @@
 {
   lib,
   stdenv,
+  fetchpatch,
   fetchFromGitHub,
   gitUpdater,
   testers,
@@ -18,6 +19,11 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-d/OkX18nyHSQXJgNhBtiCLb/Fe8Y/MpddXxLpNMZiXI=";
   };
 
+  # https://github.com/ultravideo/kvazaar/pull/426
+  postPatch = ''
+    substituteInPlace CMakeLists.txt --replace-fail 'NOT LINUX' 'NOT LINUX AND NOT BSD'
+  '';
+
   nativeBuildInputs = [ cmake ];
 
   outputs = [