39e63f110e
Currently, we build `man-cache` with `runCommandLocal`, which causes it to get re-built locally instead of fetched from cache. While the resulting derivation might be small, it does take a fair bit of time to build for all my systems, and would be _far_ quicker to fetch. With this change, we use `runCommand` instead of `runCommandLocal`, allowing it to get fetched from cache instead of rebuilt for all hosts.