nixpkgs: add cryptsetup
nixpkgs: add cryptsetup

`cryptsetup` is automatically installed if we use LUKS for encrypting
partitions. On `w0` (work VM), we did not do this, so `cryptsetup` was
not installed. The current encryption mechanism for USB drives uses
cryptsetup so we need this to use those drives from the VM.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg