theme_sources = files([
  'gnome-shell-high-contrast.scss',
  'gnome-shell.scss',
  'gnome-shell-sass/_colors.scss',
  'gnome-shell-sass/_common.scss',
  'gnome-shell-sass/_drawing.scss',
  'gnome-shell-sass/_high-contrast-colors.scss'
])

styles = [
  'gnome-shell-high-contrast',
  'gnome-shell'
]

theme_deps = []

if sassc.found()
  foreach style: styles
    theme_deps += custom_target('style-' + style,
                                input: '@0@.scss'.format(style),
                                output: '@0@.css'.format(style),
                                command: [
                                  sassc, '-a', '@INPUT@', '@OUTPUT@'
                                ],
                                depend_files: theme_sources)
  endforeach
endif