From 9c9668ade470d9dcdff8849351429af5080fb5a2 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Sat, 6 Dec 2025 13:37:41 +0100
Subject: [PATCH] opencv: fix hardcoded source path

This should fix builds for non-default fetchedSourceNameDefault and is a no-op for the default.
---
 pkgs/development/libraries/opencv/4.x.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/opencv/4.x.nix b/pkgs/development/libraries/opencv/4.x.nix
index 9451668a5837..452c234f646a 100644
--- a/pkgs/development/libraries/opencv/4.x.nix
+++ b/pkgs/development/libraries/opencv/4.x.nix
@@ -293,7 +293,7 @@ effectiveStdenv.mkDerivation {
   cudaPropagateToOutput = "cxxdev";
 
   postUnpack = optionalString buildContrib ''
-    cp --no-preserve=mode -r "${contribSrc}/modules" "$NIX_BUILD_TOP/source/opencv_contrib"
+    cp --no-preserve=mode -r "${contribSrc}/modules" "$NIX_BUILD_TOP/${src.name}/opencv_contrib"
   '';
 
   # Ensures that we use the system OpenEXR rather than the vendored copy of the source included with OpenCV.
@@ -325,7 +325,7 @@ effectiveStdenv.mkDerivation {
     installExtraFile ade
     + optionalString enableIpp (installExtraFiles ippicv)
     + (optionalString buildContrib ''
-      cmakeFlagsArray+=("-DOPENCV_EXTRA_MODULES_PATH=$NIX_BUILD_TOP/source/opencv_contrib")
+      cmakeFlagsArray+=("-DOPENCV_EXTRA_MODULES_PATH=$NIX_BUILD_TOP/${src.name}/opencv_contrib")
 
       ${installExtraFiles vgg}
       ${installExtraFiles boostdesc}