If you install a sysctl configuration snippet foobar.conf into %\{_sysctldir} (/usr/lib/sysctl.d/) you must invoke %sysctl_apply in your %post section:
....
- %sysctl_apply fooar.conf
+ %sysctl_apply foobar.conf
....
If you install a binfmt configuration snippet waldo.conf into %\{_binfmtdir} (/usr/lib/binfmt.d/) you must invoke %binfmt_apply in your %post section: