atom-shell ebuild fails to install

Hello, I've tried to merge atom shell from your overlay and it's failed during install phase with such error:

```
ninja: Entering directory `out/Release'
ninja: fatal: chdir to 'out/Release' - No such file or directory
/tmp/portage/dev-util/atom-shell-0.13.3/temp/environment: line 6329: out/Release/version: No such file or directory
cp: cannot create regular file 'out/Release': No such file or directory
>>> Source compiled.
>>> Test phase [not enabled]: dev-util/atom-shell-0.13.3

>>> Install atom-shell-0.13.3 into /tmp/portage/dev-util/atom-shell-0.13.3/image/ category dev-util
/tmp/portage/dev-util/atom-shell-0.13.3/temp/environment: line 6343: cd: out/Release: No such file or directory
doexe: warning, skipping directory atom
!!! doexe: libchromiumcontent.so does not exist
!!! doexe: libffmpegsumo.so does not exist
```

I've tried to emerge with sandbox feature disabled, but it not helped.