diff --git a/pkgs/by-name/wi/wiredtiger/package.nix b/pkgs/by-name/wi/wiredtiger/package.nix
index af3623f00816..def3c54cbb56 100644
--- a/pkgs/by-name/wi/wiredtiger/package.nix
+++ b/pkgs/by-name/wi/wiredtiger/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeFeature "CMAKE_INSTALL_LIBDIR" "lib")
   ];
 
-  env.NIX_CFLAGS_COMPILE = [ "-Wno-array-bounds" ];
+  env.NIX_CFLAGS_COMPILE = "-Wno-array-bounds";
 
   passthru.updateScript = nix-update-script { };