# File lib/specinfra/command/nixos/base/package.rb, line 3 def check_is_installed(package, version=nil) if version "nix-store -q --references /var/run/current-system/sw | grep #{escape(package)}-#{escape(version)}" else "nix-store -q --references /var/run/current-system/sw | grep #{escape(package)}" end end