diff --git a/pkgs/development/compilers/avian/default.nix b/pkgs/development/compilers/avian/default.nix
index 4dc384f70a3..387ae906b88 100644
--- a/pkgs/development/compilers/avian/default.nix
+++ b/pkgs/development/compilers/avian/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ zlib jdk ]
     ++ stdenv.lib.optionals stdenv.isDarwin [ CoreServices Foundation ];
 
-  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isClang "-Wno-error";
+  NIX_CFLAGS_COMPILE = "-Wno-error";
 
   postPatch = ''
     substituteInPlace makefile \