From 36302a3056631dc66d73c7a6343950fdb1750e77 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Thu, 27 Apr 2023 23:22:33 +0300
Subject: [PATCH] root: fix build on aarch64-darwin

---
 pkgs/applications/science/misc/root/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index 2ebfd4a1a87a..c98c50273f47 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -208,6 +208,9 @@ stdenv.mkDerivation rec {
     # fatal error: module map file '/nix/store/<hash>-Libsystem-osx-10.12.6/include/module.modulemap' not found
     # fatal error: could not build module '_Builtin_intrinsics'
     "-Druntime_cxxmodules=OFF"
+
+    # At least C++17 standard required with root7
+    "-DCMAKE_CXX_STANDARD=17"
   ];
 
   # Workaround the xrootd runpath bug #169677 by prefixing [DY]LD_LIBRARY_PATH with ${lib.makeLibraryPath xrootd}.