Warning: creating dangling symlink

From time to time I see “warning: creating dangling symlink”. The latest example:

warning: creating dangling symlink `/nix/store/x7fcqg2vy95v9ryi06nxp7sqbzb91jxn-system-path//sbin/pm-hibernate' -> `/nix/store/50d73b4hy6cgd2rrfr842ika59zih9mh-molly-guard-0.7.2/sbin/pm-hibernate'
warning: creating dangling symlink `/nix/store/x7fcqg2vy95v9ryi06nxp7sqbzb91jxn-system-path//sbin/pm-suspend' -> `/nix/store/50d73b4hy6cgd2rrfr842ika59zih9mh-molly-guard-0.7.2/sbin/pm-suspend'
warning: creating dangling symlink `/nix/store/x7fcqg2vy95v9ryi06nxp7sqbzb91jxn-system-path//sbin/pm-suspend-hybrid' -> `/nix/store/50d73b4hy6cgd2rrfr842ika59zih9mh-molly-guard-0.7.2/sbin/pm-suspend-hybrid'
warning: creating dangling symlink `/nix/store/x7fcqg2vy95v9ryi06nxp7sqbzb91jxn-system-path//sbin/coldreboot' -> `/nix/store/50d73b4hy6cgd2rrfr842ika59zih9mh-molly-guard-0.7.2/sbin/coldreboot'

I have molly-guard installed but not pmutils. (This is a server.) I’ve looked at the source of molly-guard and can’t see where it is creating the dangling symlinks. How do I debug this?

Note: the warning seems to be harmless but having a warning is unclean. It indicates an issue somewhere.