ENOENT: no such file or directory

There are quite a few ENOENT errors in the logs.
It may be related to https://github.com/clearlydefined/crawler/issues/89.
```
[Error: ENOENT: no such file or directory, link 'django-activity-stream-0.5.0/CHANGELOG.rst' -> '/tmp/cd-y0lPN7/django-activity-stream-0.5.0/docs/source/changelog.rst'] {
errno: -2,
code: 'ENOENT',
syscall: 'link',
path: 'django-activity-stream-0.5.0/CHANGELOG.rst',
dest: '/tmp/cd-y0lPN7/django-activity-stream-0.5.0/docs/source/changelog.rst'
}
```

```
[Error: ENOENT: no such file or directory, link 'lmfit-0.7.2/tests/CurveFit/NIST_STRD/Hahn1.dat' -> '/tmp/cd-aOdOgy/lmfit-0.7.2/tests/NIST_STRD/Hahn1.dat'] {
errno: -2,
code: 'ENOENT',
syscall: 'link',
path: 'lmfit-0.7.2/tests/CurveFit/NIST_STRD/Hahn1.dat',
dest: '/tmp/cd-aOdOgy/lmfit-0.7.2/tests/NIST_STRD/Hahn1.dat'
}
```

```
[Error: ENOENT: no such file or directory, open '/tmp/cd-m9L9Bc/data/pry-docmore.wiki/Ruby Global $/ (DollarBackslash).md'] {
errno: -2,
code: 'ENOENT',
syscall: 'open',
path: '/tmp/cd-m9L9Bc/data/pry-docmore.wiki/Ruby Global $/ (DollarBackslash).md'
}
```

```
[Error: ENOENT: no such file or directory, lstat '/tmp/cd-3AK7Kd/data'] { errno: -2, code: 'ENOENT', syscall: 'lstat', path: '/tmp/cd-3AK7Kd/data' }
```

```
[Error: ENOENT: no such file or directory, lstat '/tmp/cd-KPOa8Q/data'] {
errno: -2,
code: 'ENOENT',
syscall: 'lstat',
path: '/tmp/cd-KPOa8Q/data'
}
```