Thank you for the explanation.
> 0%{__isa_bits} == 64 should be the proper syntax.
BTW, I used originally "%if %{__isa_bits} == 64" as I found it in the official
documentation [here](https://rpm.org/user_doc/arch_dependencies.html). Please
consider to correct it, if without `0` it is somehow
Both versions:
- [%if %{__isa_bits} ==
64](https://src.fedoraproject.org/rpms/fixedptc/c/d9cb4b48e03e49b8865b20dacbfb81ef3192896a?branch=a420237f72f3d48a762fa6e967d3c38a443d59b0)
- works on rawhide on local mock and
Compiling
[fixedptc](https://src.fedoraproject.org/rpms/fixedptc/blob/master/f/fixedptc.spec#_57)
package failed in koji as follows:
```
error: parse error in expression: %{__isa_bits} == 64
error: ^
error: /builddir/build/SPECS/fixedptc.spec:57: bad %if condition:
