1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/science/biology/niftyreg/default.nix b/pkgs/applications/science/biology/niftyreg/default.nix
index 58ad9db7f4e..0be59bcd726 100644
--- a/pkgs/applications/science/biology/niftyreg/default.nix
+++ b/pkgs/applications/science/biology/niftyreg/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "07v9v9s41lvw72wpb1jgh2nzanyc994779bd35p76vg8mzifmprl";
   };
 
-  NIX_CFLAGS_COMPILE = toString [ "-Wno-error=narrowing" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-Wno-error=narrowing" ];
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ zlib ];