diff --git a/pkgs/by-name/ai/airshipper/package.nix b/pkgs/by-name/ai/airshipper/package.nix
index aba284758545..4731be7ce016 100644
--- a/pkgs/by-name/ai/airshipper/package.nix
+++ b/pkgs/by-name/ai/airshipper/package.nix
@@ -87,7 +87,7 @@ rustPlatform.buildRustPackage {
     makeWrapper
   ];
 
-  RUSTC_BOOTSTRAP = 1; # We need rust unstable features
+  env.RUSTC_BOOTSTRAP = 1; # We need rust unstable features
 
   postInstall = ''
     install -Dm444 -t "$out/share/applications" "client/assets/net.veloren.airshipper.desktop"