From bb9b3fdcad3d62539b15b270a3c67cb211c2a08d Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Mon, 20 Jul 2026 11:10:34 -0400
Subject: [PATCH] compat: drop DiffRules 0.1

Remove the stale pre-1.0 compatibility entry. Current Symbolics and NaNMath constraints already require DiffRules 1.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
---
 lib/ModelingToolkitBase/Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ModelingToolkitBase/Project.toml b/lib/ModelingToolkitBase/Project.toml
index 720ea73f74..c6191e56ad 100644
--- a/lib/ModelingToolkitBase/Project.toml
+++ b/lib/ModelingToolkitBase/Project.toml
@@ -114,7 +114,7 @@ DelayDiffEq = "5.61, 6"
 DiffEqBase = "7.4.2"
 DiffEqCallbacks = "4"
 DiffEqNoiseProcess = "5"
-DiffRules = "0.1, 1.0"
+DiffRules = "1"
 DifferentiationInterface = "0.6.47, 0.7"
 Distributed = "1"
 DocStringExtensions = "0.8, 0.9"