anchor.diff: -{ stdenv, fetchurl, openssl, libtool, perl, libxml2 }:
  +{ stdenv, fetchurl, openssl, libtool, perl, libxml2
  +, libseccomp ? null }:
   
   let version = "9.10.4-P3"; in
   
  
positive.code:   patches = [ ./dont-keep-configure-flags.patch ./remove-mkdir-var.patch ] ++
      stdenv.lib.optional stdenv.isDarwin ./darwin-openssl-linking-fix.patch;
  
    buildInputs = [ openssl libtool perl libxml2 ];
  
    configureFlags = [
      "--localstatedir=/var"
  
negative.code:     "--without-pkcs11"
      "--without-purify"
      "--without-python"
      "--enable-seccomp"
    ];
  
    postInstall = ''
  