systemd.tmpfiles.settings.<config-name>.<path>.<tmpfiles-type>.type

The type of operation to perform on the file.

The type consists of a single letter and optionally one or more modifier characters.

Please see the upstream documentation for the available types and more details: tmpfiles.d(5)

Type
string
Default
"‹tmpfiles-type›"
Example
"d"
Declared
<nixpkgs/nixos/modules/system/boot/systemd/tmpfiles.nix>