diff --git a/pkgs/by-name/ce/celeste/package.nix b/pkgs/by-name/ce/celeste/package.nix
index 911d3f54429a..e3535bf41e09 100644
--- a/pkgs/by-name/ce/celeste/package.nix
+++ b/pkgs/by-name/ce/celeste/package.nix
@@ -54,7 +54,7 @@ rustPlatform.buildRustPackage rec {
       --replace-warn 'edition = "2021"' 'edition = "2024"'
   '';
 
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   nativeBuildInputs = [
     just