nix/hm: add systemd.target in home-manager (#532)

* nix: add systemd.target

* fix: format

* Update README.md

* Update hm-module.nix

https://github.com/Vladimir-csp/uwsm/blob/cf2b1d84059f1954d4ec864f2b46a86515acc3c1/example-units/hyprpaper.service#L19

* fix

* Update README.md

1 files changed, 4 insertions, 1 deletions

diff --git a/README.md b/README.md
index 61034f0..c033353 100644
--- a/README.md
+++ b/README.md
@@ -213,7 +213,10 @@ For NixOS users, a home manager module is also available.
 ```nix
 programs.caelestia = {
   enable = true;
-  systemd.enable = false; # if you prefer starting from your compositor
+  systemd = {
+    enable = false; # if you prefer starting from your compositor
+    target = "graphical-session.target";
+  };
   settings = {
     bar.status = {
       showBattery = false;