Gentoo's Bugzilla –
Attachment 863436 Details for
Bug 907965media-libs/mesa-23.1.1: chooses mismatched LLVM version, fails due to wrong version of dev-util/spirv-llvm-translator (Dependency LLVMSPIRVLib found: NO found 15.0.0.0 but need: '>= 16.0' ; matched: '>= 8.0.1.3', '< 16.1')