Multiple imports cause errors

[Nekroze]

When imported multiple times, evaluation fails for me with a peculiar (because it does not seem directly related) error:

error: while evaluating the attribute 'config' at /nix/var/nix/profiles/per-user/root/channels/nixos/nixos/lib/eval-config.nix:58:5:
while evaluating the attribute 'config' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:87:25:
while evaluating 'yieldConfig' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:74:29, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:73:16:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:24, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:11:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:26, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:13:
The option `outPath' defined in `/etc/nixos/components/vms.nix' does not exist.
building Nix...
error: while evaluating the attribute 'config' at /nix/var/nix/profiles/per-user/root/channels/nixos/nixos/lib/eval-config.nix:58:5:
while evaluating the attribute 'config' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:87:25:
while evaluating 'yieldConfig' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:74:29, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:73:16:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:24, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:11:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:26, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:13:
The option `outPath' defined in `/etc/nixos/components/vms.nix' does not exist.
building the system configuration...
error: while evaluating the attribute 'config.system.build.toplevel' at /nix/var/nix/profiles/per-user/root/channels/nixos/nixos/lib/eval-config.nix:58:5:
while evaluating the attribute 'config' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:87:25:
while evaluating 'yieldConfig' at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:74:29, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:73:16:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:24, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:80:11:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:26, called from /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:81:13:
The option `outPath' defined in `/etc/nixos/components/vms.nix' does not exist.

I have yet to do a minimal reproduction of this error.