Could not find file "/etc/localtime"

I'm using Gitlab-CI to build electron and creating Windows single .exe with this docker image
`electronuserland/builder:wine-mono`

give me this error. /etc/localtime exist in this docker image. I don't know from where this come from.

```
creating windows installer for Alfred POS
config { appDirectory: 'release-builds/synchro-pos-win32-x64/',
authors: 'Celliers Intelligents',
noMsi: true,
outputDirectory: 'release-builds/windows-installer',
exe: 'synchro-pos.exe',
setupExe: 'AlfredPosInstaller.exe' }
path exist? true
electron-windows-installer:main Using Mono: 'mono' +0ms
electron-windows-installer:main Using Wine: 'wine' +1ms
electron-windows-installer:main Created NuSpec file:
electron-windows-installer:main 
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main synchro-pos
electron-windows-installer:main synchro-pos
electron-windows-installer:main 1.1.1
electron-windows-installer:main Celliers Intelligents
electron-windows-installer:main Celliers Intelligents
electron-windows-installer:main https://raw.githubusercontent.com/atom/electron/master/atom/browser/resources/win/atom.ico
electron-windows-installer:main false
electron-windows-installer:main P.O.S synchronization app
electron-windows-installer:main Copyright © 2018 Celliers Intelligents
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main +120ms
electron-windows-installer:spawn Spawning mono /builds/celliersintelligents/synchro-pos/node_modules/electron-winstaller/vendor/nuget.exe pack /tmp/si-11818-1481-13ugw8f.gwns/synchro-pos.nuspec -BasePath release-builds/synchro-pos-win32-x64/ -OutputDirectory /tmp/si-11818-1481-13ugw8f.gwns -NoDefaultExcludes +3ms
Unhandled rejection Error: Failed with exit code: 1
Output:
Attempting to build package from 'synchro-pos.nuspec'.
Could not find file "/etc/localtime"

at ChildProcess.proc.on.code (/builds/celliersintelligents/synchro-pos/node_modules/electron-winstaller/lib/spawn-promise.js:62:16)
at ChildProcess.emit (events.js:160:13)
at maybeClose (internal/child_process.js:943:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:220:5)
Done in 1.47s.
```