'/var/setuid-wrappers' are not removed on GCE

[P-E-Meunier]

I get this error every time I deploy my GCE instances:

 rm: cannot remove '/var/setuid-wrappers': Device or resource busy

[AmineChikhaoui]

@P-E-Meunier Which nixpkgs version is this on ? and is this on every single deploy or just in the initial one ?
I'm using nixpkgs 17.09 and didn't see this