Serenity doesn't use /sbin.
--- a/Makefile.in.orig
+++ b/Makefile.in
@@ -87,7 +87,7 @@
 exec_prefix=@exec_prefix@
 datarootdir = @datarootdir@
 bindir=@bindir@
-sbindir=@sbindir@
+sbindir=$(bindir)
 mandir=@mandir@
 
 .DELETE_ON_ERROR:
