Motivation for this change

With Nix on CentOS 6, I installed sublime3, but after installing Package Control in sublime, I get shown an error saying:

Your system's locale is set to a value that can not handle non-ASCII characters. Package Control can not properly work unless this is fixed.

On Linux, please reference your distribution's docs for information on properly setting the LANG and LC_CTYPE environmental variables. As a temporary work-around, you can launch Sublime Text from the terminal with:

LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 sublime_text

but my system locale is already en_US.UTF-8.

This change solves the problem.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
  • sandboxing messed up on CentOS 6
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
  • only tested sublime_text
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.