From 39c42cdc8c7b9d08feaf7ee5c59cea2c1b2bf868 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 24 Nov 2025 20:00:48 +0100
Subject: [PATCH] Use `builtins.fetchFinalTree` if available

Unlike `fetchTree`, this allow inputs to be substituted (since the
fetcher won't return any output attributes like `revCount` that
weren't in the input attributes).
---
 default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/default.nix b/default.nix
index 441c8bc..ca48147 100644
--- a/default.nix
+++ b/default.nix
@@ -18,7 +18,7 @@ let
   lockFile = builtins.fromJSON (builtins.readFile lockFilePath);
 
   fetchTree =
-    builtins.fetchTree or (
+    builtins.fetchFinalTree or builtins.fetchTree or (
       info:
       if info.type == "github" then
         {