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-rw-r--r--pkgs/development/libraries/opencv/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/opencv/default.nix b/pkgs/development/libraries/opencv/default.nix
index 73b0874dde5a..059dc69df120 100644
--- a/pkgs/development/libraries/opencv/default.nix
+++ b/pkgs/development/libraries/opencv/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config unzip ];
 
-  NIX_CFLAGS_COMPILE = lib.optionalString enableEXR "-I${ilmbase.dev}/include/OpenEXR";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString enableEXR "-I${ilmbase.dev}/include/OpenEXR";
 
   cmakeFlags = [
     (opencvFlag "TIFF" enableTIFF)