anchor.diff:      preBuild = ''
         export DEFAULT_SECCOMP_POLICY_DIR=$out/share/policy
       '';
  +
  +    buildFeatures = [ "default" "virgl_renderer" "virgl_renderer_next" ];
   
       postInstall = ''
         mkdir -p $out/share/policy/
  
positive.code: { stdenv, lib, rustPlatform, fetchgit
  , pkg-config, wayland-scanner, libcap, minijail, wayland, wayland-protocols
  , linux
  }:
  
  
negative.code: 
      nativeBuildInputs = [ pkg-config wayland-scanner ];
  
      buildInputs = [
        libcap libdrm libepoxy minijail virglrenderer wayland wayland-protocols
      ];
  
      postPatch = ''
        cp ${./Cargo.lock} Cargo.lock
  