Locheck fails when homebrew has a custom path.

### Steps to reproduce

1. Set up homebrew to install in a custom path e.g. `/Users/vm/local/homebrew/bin/`
2. Build the project

### Outcome

#### What did you expect?
The project to build.

#### What happened instead?
It fails saying `xcrun:1:1: unable to find utility "mint", not a developer tool or in PATH`.

Reproduce the project build with Homebrew installed at the custom path shown in the issue and inspect the Locheck build entry point and its handling of the mint executable. Trace why xcrun cannot find mint, then verify that the project builds successfully with the custom Homebrew location.

Written by the indexing model from the issue text.