wrk: use packaged openssl, luajit (#24481)

This has the side effect of now building on darwin. Previously, the
vendored luajit would fail to build.

pkgs/tools/networking/wrk/default.nix

···
-{ stdenv, fetchFromGitHub, openssl, perl }:
+{ stdenv, fetchFromGitHub, luajit, openssl, perl }:
 
 stdenv.mkDerivation rec {
   name = "wrk-${version}";
···
     sha256 = "1qg6w8xz4pr227h1gxrbm6ylhqvspk95hvq2f9iakni7s56pkh1w";
   };
 
-  buildInputs = [ openssl perl ];
+  buildInputs = [ luajit openssl perl ];
+
+  makeFlags = [ "WITH_LUAJIT=${luajit}" "WITH_OPENSSL=${openssl.dev}" "VER=${version}" ];
+
+  preBuild = ''
+    for f in src/*.h; do
+      substituteInPlace $f \
+        --replace "#include <luajit-2.0/" "#include <"
+    done
+  '';
   
   installPhase = ''
     mkdir -p $out/bin
···
     '';
     license = licenses.asl20;
     maintainers = with maintainers; [ ragge ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 }