My problem is (and this phrasing will probably reflect my absence of information on the topic): just before config.fish becoming processed, in which is The trail variable set? ie: where by do the entire paths involving /usr/local/bin and /End users/myname/.opam/method/bin originate from? @Maximilian Many thanks! the second component of this https://cat-shop-dubai43210.mybuzzblog.com/17492627/the-fish-tank-maintenance-dubai-diaries