diff --git a/firstboot/meson.build b/firstboot/meson.build
index 743eab5..f5156a0 100644
--- a/firstboot/meson.build
+++ b/firstboot/meson.build
@@ -15,7 +15,7 @@
         input: 'first-boot-set-mac@.service',
         output: 'first-boot-set-mac@.service',
         copy: true,
-        install_dir: set_mac.get_variable('systemdsystemunitdir'),
+        install_dir: set_mac.get_variable('systemd_system_unit_dir'),
     )
 endif
 
@@ -30,6 +30,6 @@
         input: 'first-boot-set-hostname.service',
         output: 'first-boot-set-hostname.service',
         copy: true,
-        install_dir: set_hostname.get_variable('systemdsystemunitdir'),
+        install_dir: set_hostname.get_variable('systemd_system_unit_dir'),
     )
 endif