nixos: systemd: add missing sliceToUnit (#179841)
Seem to be omitted in https://github.com/NixOS/nixpkgs/commit/022b4209a398b0648e4d5e2bead42ad9662ad764#diff-5ea4693beb4bdd8f7efcdd3204ceea67c86f59b3d1c28cde063ddf03e1d20fbfL29.
Et7f3 3 years ago 6b820ecf d9d051d6
··· 14 generateUnits 15 targetToUnit 16 serviceToUnit 0 17 socketToUnit 18 timerToUnit 19 pathToUnit;
··· 14 generateUnits 15 targetToUnit 16 serviceToUnit 17 + sliceToUnit 18 socketToUnit 19 timerToUnit 20 pathToUnit;