1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
index d6531452c76..1ff7f0abeba 100644
--- a/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/guest-additions/default.nix
@@ -31,7 +31,7 @@ in stdenv.mkDerivation rec {
 
   hardeningDisable = [ "pic" ];
 
-  NIX_CFLAGS_COMPILE = "-Wno-error=incompatible-pointer-types -Wno-error=implicit-function-declaration";
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=incompatible-pointer-types -Wno-error=implicit-function-declaration";
 
   nativeBuildInputs = [ patchelf makeWrapper ];
   buildInputs = [ cdrkit ] ++ kernel.moduleBuildDependencies;