osx: override default exclude filter for pkgbuild To quote `man 1 pkgbuild`: --filter filter-expression By default, --root will include the entire contents of the given root-path in the package payload, except for any .svn or CVS directories, and any .DS_Store files. You can override these default filters by specifying one or more --filter options. Each filter-expression is an re_format(7) ``extended'' expression: any path in the root which matches any of the given expressions will be excluded from the pack- age payload. (Note that specifying even one --filter inhibits the default filters, so you must respecify the default fil- ters if you still want them to be used.) It turns out the default filter these days *also* includes .git and .hg. Notice how that filter expression is a regular expression? That (presumably unintentionally) prevents a file named "chg" or "_hg" from getting included in the distribution. Many many thanks to spectral@ for trying to include a _hg file which led us to figure this bug out. Bug filed with Apple for this as rdar://problem/32437369, mentioning both the gap in documentation and the wrong defaults.