This appears to inexplicably break the OS X build, which fails with:
```
make[1]: *** No rule to make target `utils/unlit/fs.c', needed by
         `utils/unlit/dist/build/.depend.c_asm'.  Stop.
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 2
```

This reverts commit 8ee9c574.