diff --git a/pkgs/by-name/bl/bloodspilot-client/package.nix b/pkgs/by-name/bl/bloodspilot-client/package.nix
index 7436908119bb..fbe24e541983 100644
--- a/pkgs/by-name/bl/bloodspilot-client/package.nix
+++ b/pkgs/by-name/bl/bloodspilot-client/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
     zlib
   ];
 
-  NIX_LDFLAGS = "-lX11";
+  env.NIX_LDFLAGS = "-lX11";
 
   meta = {
     description = "Multiplayer space combat game (client part)";