diff --git a/pkgs/applications/audio/deadbeef/plugins/musical-spectrum.nix b/pkgs/applications/audio/deadbeef/plugins/musical-spectrum.nix
index a5d89de1e3c7..4a25d26d7068 100644
--- a/pkgs/applications/audio/deadbeef/plugins/musical-spectrum.nix
+++ b/pkgs/applications/audio/deadbeef/plugins/musical-spectrum.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
   ];
   makeFlags = [ "gtk3" ];
 
-  NIX_CFLAGS_COMPILE = "-Wno-incompatible-pointer-types";
+  env.NIX_CFLAGS_COMPILE = "-Wno-incompatible-pointer-types";
 
   installPhase = ''
     runHook preInstall