From 6b9ace26799f5dbcdefb64a6175fc52cf205a4da Mon Sep 17 00:00:00 2001
From: Jordan Pittman <jordan@cryptica.me>
Date: Wed, 16 Apr 2025 18:04:03 -0400
Subject: [PATCH] Track utilities generated by `@apply`

---
 packages/tailwindcss/src/apply.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/tailwindcss/src/apply.ts b/packages/tailwindcss/src/apply.ts
index 6038c4b8d..0b7b3ad16 100644
--- a/packages/tailwindcss/src/apply.ts
+++ b/packages/tailwindcss/src/apply.ts
@@ -167,8 +167,13 @@ export function substituteAtApply(ast: AstNode[], designSystem: DesignSystem) {
           },
         })
 
+        let src = node.src
         let candidateAst = compiled.astNodes
 
+        walk(candidateAst, (node) => {
+          node.src = src
+        })
+
         // Collect the nodes to insert in place of the `@apply` rule. When a rule
         // was used, we want to insert its children instead of the rule because we
         // don't want the wrapping selector.