Fix cycle detection in `nix repl` (cherry picked from commit e190c20c3394fd1a5cd9be1afc3f30ab32dcd36b) Change-Id: Ie385e781b9f0b7171ca653bcd53a990bb41f9e4b
Ie385e781b9f0b7171ca653bcd53a990bb41f9e4b