diff --git a/pkgs/by-name/zo/zola/package.nix b/pkgs/by-name/zo/zola/package.nix
index 8505e0be2f2f..85f94a5c370a 100644
--- a/pkgs/by-name/zo/zola/package.nix
+++ b/pkgs/by-name/zo/zola/package.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
     oniguruma
   ];
 
-  RUSTONIG_SYSTEM_LIBONIG = true;
+  env.RUSTONIG_SYSTEM_LIBONIG = true;
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd zola \