From 26b51ec16dd3fa98121a02da6b34a86ad0420776 Mon Sep 17 00:00:00 2001
From: Eman Resu <78693624+quatquatt@users.noreply.github.com>
Date: Sat, 9 May 2026 19:11:05 -0400
Subject: [PATCH] stdenv.mkDerivation: avoid concat if separateDebugInfo' is
 false

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

diff --git a/pkgs/stdenv/generic/make-derivation.nix b/pkgs/stdenv/generic/make-derivation.nix
index 54282e05df77..a64b1119fead 100644
--- a/pkgs/stdenv/generic/make-derivation.nix
+++ b/pkgs/stdenv/generic/make-derivation.nix
@@ -399,7 +399,7 @@ let
           } requires __structuredAttrs if {dis,}allowedRequisites or {dis,}allowedReferences is set"
         else
           actualValue;
-      outputs' = outputs ++ optional separateDebugInfo' "debug";
+      outputs' = if separateDebugInfo' then outputs ++ [ "debug" ] else outputs;
 
       concretizeFlagImplications =
         flag: impliesFlags: list: