From c5bb1534216d53434e4ba8abfdb78032d4749502 Mon Sep 17 00:00:00 2001
From: Yueh-Shun Li <shamrocklee@posteo.net>
Date: Tue, 18 Nov 2025 02:14:58 +0800
Subject: [PATCH] mkDerivation: makeDerivationExtensible: only trigger the
 version-overridden warning when src presented

---
 pkgs/stdenv/generic/make-derivation.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/stdenv/generic/make-derivation.nix b/pkgs/stdenv/generic/make-derivation.nix
index d00df6ff4139..8294e555a4ab 100644
--- a/pkgs/stdenv/generic/make-derivation.nix
+++ b/pkgs/stdenv/generic/make-derivation.nix
@@ -99,7 +99,8 @@ let
                 prev = f final;
                 thisOverlay = overlay final prev;
                 warnForBadVersionOverride = (
-                  thisOverlay ? version
+                  prev ? src
+                  && thisOverlay ? version
                   && prev ? version
                   # We could check that the version is actually distinct, but that
                   # would probably just delay the inevitable, or preserve tech debt.