diff --git a/pkgs/applications/video/obs-studio/plugins/obs-hyperion/default.nix b/pkgs/applications/video/obs-studio/plugins/obs-hyperion/default.nix
index 7ffa72461ef6..ab8036ac7eaf 100644
--- a/pkgs/applications/video/obs-studio/plugins/obs-hyperion/default.nix
+++ b/pkgs/applications/video/obs-studio/plugins/obs-hyperion/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     "-DUSE_SYSTEM_FLATBUFFERS_LIBS=ON"
   ];
 
-  NIX_CFLAGS_COMPILE = [ "-Wno-error" ];
+  env.NIX_CFLAGS_COMPILE = toString [ "-Wno-error" ];
 
   preConfigure = ''
     rm -rf external/flatbuffers