$brand-primary undefined during Grunt Server

[yaboi]

$ grunt server fails and displays the following error.

Running "compass:server" (compass) task                                                                                                                                                        
    directory .tmp/styles                                                                                                                                                                          
        write .tmp/styles/bootstrap.css (3.334s)                                                                                                                                                   
        error beep/styles/plugins.scss (Line 6 of beep/styles/plugins/_bootstrap-slider.scss: Undefined variable: "$brand-primary".)                                                               
        error beep/styles/ui.scss (Line 23 of beep/styles/ui/components/_scaffolding.scss: Undefined variable: "$brand-primary".)                                                                  
    Compilation failed in 2 files.                                                                                                                                                                 
    Warning: ↑ Used --force, continuing.                                                                                                                                                           

    Done, but with warnings.

Problem has been traced back to $brand-primary global variable being undefined during SASS compiling.

[yaboi]

Importing ./global/_var.scss into plugins.scss and ui.scss in order to fix this issue.