From 2eba52f6749d87bf6041964fdf7550eadbd8bdee Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Thu, 2 Jan 2025 11:40:48 -0500
Subject: [PATCH] Avoid forking on version in non-universal resolutions
 (#10274)

## Summary

Closes https://github.com/astral-sh/uv/issues/10275.
---
 crates/uv-resolver/src/resolver/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/crates/uv-resolver/src/resolver/mod.rs b/crates/uv-resolver/src/resolver/mod.rs
index 7873a44e0..e57bc54e1 100644
--- a/crates/uv-resolver/src/resolver/mod.rs
+++ b/crates/uv-resolver/src/resolver/mod.rs
@@ -1328,6 +1328,11 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
         pins: &mut FilePins,
         request_sink: &Sender<Request>,
     ) -> Result<Option<ResolverVersion>, ResolveError> {
+        // This only applies to universal resolutions.
+        if env.marker_environment().is_some() {
+            return Ok(None);
+        }
+
         // For now, we only apply this to local versions.
         if !candidate.version().is_local() {
             return Ok(None);