Created attachment 932122 [details] build.log When libfmt is installed on the system, configuration fails with the error 'IMPORTED_IMPLIB not set for imported target "fmt::fmt" configuration "RELEASE"'. This is due to the host system's libfmt being picked up by find_package and attempting to be used. Passing -DCMAKE_DISABLE_FIND_PACKAGE_fmt=true to the cmake invocation fixes the issue.
Unable to repro, maybe it is a musl-specific thing? Anyway, adding DCMAKE_DISABLE_FIND_PACKAGE_fmt does not seem to hurt, so will just do that.