blueprints = custom_target(
  'blueprints',
  input: files('play_queue.blp', 'play_queue_song.blp', 'setup.blp', 'window.blp'),
  output: ['play_queue.ui', 'play_queue_song.ui', 'setup.ui', 'window.ui'],
  command: [
    find_program('blueprint-compiler'),
    'batch-compile',
    '@OUTDIR@',
    '@CURRENT_SOURCE_DIR@',
    '@INPUT@',
  ],
)