Hi, since firefox 54 rust isn't optional anymore, you could use firefox 52 esr/firefox-bin (?) if you don't want to compile rust.
Regards, Rasmus -------- Original Message -------- On 22 Jun 2017, 09:13, Danny YUE wrote: Hi guys, I just found during upgrading my system that Firefox 54.0 depends on dev-lang/rust and cannot be disabled?! It really takes a long time to compile rust, and I do not want to add such a burden to my system compilation time. Does anyone knows why? Any idea? Thanks. Danny