# Problem with development on Windows with Docker and mounted volume

**URL:** <https://meta.discourse.org/t/problem-with-development-on-windows-with-docker-and-mounted-volume/139523>\
**Category:** Development\
**Created:** [January 23, 2020, 10:35am UTC](https://meta.discourse.org/t/problem-with-development-on-windows-with-docker-and-mounted-volume/139523 "2020-01-23T10:35:20Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![Nikolay](https://avatars.discourse-cdn.com/v4/letter/n/a698b9/32.png) [@Nikolay](https://meta.discourse.org/u/Nikolay)\
**Post date:** [January 23, 2020, 10:35am UTC](https://meta.discourse.org/t/problem-with-development-on-windows-with-docker-and-mounted-volume/139523/1 "2020-01-23T10:35:20Z")

</div>

Hello, i cannot develop on windows, because get blank screen. When i open console i get this errors:

```plaintext
(X) ember_jquery.js?1579775136.5740232:1 Uncaught Error: Errno::EEXIST: File exists @ dir_s_mkdir - /var/discourse/tmp/cache/assets/sprockets/v3.0/pr
  (in /home/gaijinsailor/.rbenv/versions/2.6.2/lib/ruby/2.6.0/fileutils.rb:239:in `mkdir')
    at ember_jquery.js?1579775136.5740232:1

```

and alot of similar errors.

So, basically, discourse cannot load scripts. When i open script in separate window i get following error:

```plaintext
Script: http://localhost:3000/assets/locales/en_US.js?1579775136.5398135
Body: throw Error("Errno::EEXIST: File exists @ dir_s_mkdir - /var/discourse/tmp/cache/assets/sprockets/v3.0/x2\n (in /home/gaijinsailor/.rbenv/versions/2.6.2/lib/ruby/2.6.0/fileutils.rb:239:in `mkdir')")

```

So i start digging, and i realized that problem is with sprockets. I mounted disourse dir from windows to docker, and filesystem is case insensitive. And sprockets seems like work only on linux like filesystems (like ext4) which can make dir case sensitive.

Is there any solution to this problem?  
Thanks

UPD: this issue with sprockets is documented on github: [FileStore cache patch in v3.6 causes directory name collisions in Windows · Issue #283 · rails/sprockets · GitHub](https://github.com/rails/sprockets/issues/283)  
but issue is still open, and no solution ☹

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