silly uki image with the systemd-ukify tooling

flake.nix

@@ -116,6 +116,39 @@
             cp ${pkgs.kmod.lib}/lib/* ./usr/lib
             cp ${pkgs.libbpf.out}/lib/libbpf* ./usr/lib
 
+            # FIXME: remove this
+            cat <<EOF > usr/lib/systemd/system/demo.service
+            [Unit]
+            Description=Debug Shell (/bin/sulogin)
+            Conflicts=shutdown.target
+            Before=shutdown.target
+
+            [Service]
+            Environment=HOME=/root
+            WorkingDirectory=/root
+            ExecStart=/bin/sulogin
+            Type=idle
+            StandardInput=tty-force
+            StandardOutput=inherit
+            StandardError=inherit
+            KillMode=process
+            IgnoreSIGPIPE=no
+            SendSIGHUP=yes
+            Restart=always
+
+            [Install]
+            WantedBy=basic.target
+            EOF
+            mkdir usr/lib/systemd/system/basic.target.wants
+            ln -sf ../demo.service usr/lib/systemd/system/basic.target.wants/demo.service
+
+            # set default target
+            ln -sf basic.target usr/lib/systemd/system/default.target
+            # remove first boot
+            rm -f usr/lib/systemd/system/sysinit.target.wants/systemd-firstboot.service
+            # remove vconsole setup
+            rm -f usr/lib/udev/rules.d/90-vconsole.rules
+
             # install busybox
             cp ${pkgs.busybox.out}/bin/busybox usr/bin/
             usr/bin/busybox --list | xargs -I {} ln -sf busybox usr/bin/{}

systemd/default.nix

@@ -292,7 +292,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.mesonEnable "man" false)
 
     (lib.mesonBool "analyze" true)
-    (lib.mesonBool "logind" false)
+    (lib.mesonBool "logind" true)
     (lib.mesonBool "localed" false)
     (lib.mesonBool "hostnamed" true)
     (lib.mesonBool "machined" true)