diff --git a/pkgs/by-name/ms/mslicer/package.nix b/pkgs/by-name/ms/mslicer/package.nix
index 8ea8d7a216e5..de95af66bafb 100644
--- a/pkgs/by-name/ms/mslicer/package.nix
+++ b/pkgs/by-name/ms/mslicer/package.nix
@@ -40,7 +40,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   # Force linking to libEGL, which is always dlopen()ed, and to
   # libwayland-client & libxkbcommon, which is dlopen()ed based on the
   # winit backend.
-  NIX_LDFLAGS = [
+  env.NIX_LDFLAGS = toString [
     "--push-state"
     "--no-as-needed"
     "-lEGL"