From c89c22a9c28d0487fbbf0e026ba37239464b0779 Mon Sep 17 00:00:00 2001
From: Yueh-Shun Li <44064051+ShamrockLee@users.noreply.github.com>
Date: Fri, 17 Feb 2023 19:17:10 +0800
Subject: [PATCH 1/2] root: separateDebugInfo = true on Linux

---
 pkgs/applications/science/misc/root/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index cfda819a42ca..e38bb2ec8fdd 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -261,6 +261,14 @@ stdenv.mkDerivation rec {
     ]}"
   '';
 
+  # To use the debug information on the fly (without installation)
+  # add the outPath of root.debug into NIX_DEBUG_INFO_DIRS (in PATH-like format)
+  # and make sure that gdb from Nixpkgs can be found in PATH.
+  #
+  # Building with debug info and separating them is not supported on all systems
+  # e.g. Darwin fails to support it (#203380)
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
+
   setupHook = ./setup-hook.sh;
 
   meta = with lib; {

From b96226578e8454f2db2b80bb4847bebd748a3857 Mon Sep 17 00:00:00 2001
From: Yueh-Shun Li <44064051+ShamrockLee@users.noreply.github.com>
Date: Sun, 5 Mar 2023 03:30:17 +0800
Subject: [PATCH 2/2] root: specify separateDebugInfo = true for all pltforms

---
 pkgs/applications/science/misc/root/default.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index e38bb2ec8fdd..a33af5795108 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -265,9 +265,10 @@ stdenv.mkDerivation rec {
   # add the outPath of root.debug into NIX_DEBUG_INFO_DIRS (in PATH-like format)
   # and make sure that gdb from Nixpkgs can be found in PATH.
   #
-  # Building with debug info and separating them is not supported on all systems
-  # e.g. Darwin fails to support it (#203380)
-  separateDebugInfo = stdenv.hostPlatform.isLinux;
+  # Darwin currently fails to support it (#203380)
+  # we set it to true hoping to benefit from the future fix.
+  # Before that, please make sure if root.debug exists before using it.
+  separateDebugInfo = true;
 
   setupHook = ./setup-hook.sh;