Problem: Unable to build some documentation with full-racket

```
$ nix-build --argstr package math-x86_64-linux-natipkg --arg overlays '[ (self: super: { racket = super.racket-full; }) ]'
[ . . . ]
raco setup: --- building documentation ---
raco setup: docs failure: make-directory: cannot make directory
  path: /homeless-shelter/
  system error: Permission denied; errno=13
```

Works with the default `racket-minimal`.

Priority: low
Urgency: low