Enabling setupci in build.zig leads to compilation error

Hi, this commit https://github.com/allyourcodebase/opus/commit/400b2c9ffa8b7f6a0c7cb4e65a0e4e3ab1217f28 leads to the following errors, when I try to import this package into my code:

`
error: not an ELF file
note: while parsing .zig-cache/o/ea3fd2f12b3d88a04dfb277df484ea2e/opus_x86_64_sse2.lib
error: not an ELF file
note: while parsing .zig-cache/o/ddbae7a6cfc5d6ee694aac391b686508/repacketizer.o
error: not an ELF file
note: while parsing .zig-cache/o/d107639d944b9dcf5b5c3e50f1b8b141/extensions.o
error: not an ELF file
(...)
`

I tried to port it to the release of 0.16 and was able to compile this package as a standalone, but when trying to build awebo I always ran into this error so I thought for hours I did something wrong or missed something... until I tested the above commit in a fresh zig project using 0.16.0-dev.3061+9b1eaad13 where I only import this package and ...it fails aswell, but when I disable setupCI, everything works fine....