These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.43 s (backtrack: 0/20).


emerge: there are no ebuilds to satisfy "dev-lang/rust-bin:1.98.1[llvm_slot_22,llvm_targets_BPF(+),rust_sysroots_bpf(-)]".
(dependency required by "dev-util/bpf-linker-0.12.0::gentoo[llvm_slot_22]" [ebuild])
(dependency required by "net-proxy/mitmproxy-linux-0.12.11::gentoo" [ebuild])
(dependency required by "net-proxy/mitmproxy-rs-0.12.11::gentoo" [ebuild])
(dependency required by "net-proxy/mitmproxy-12.2.3::gentoo" [ebuild])
(dependency required by "=net-proxy/mitmproxy-12.2.3" [argument])