emits PKG_CONFIG_PATH; forces re-installation of each explicitly listed package in Aptfile

- avoid `-fPIC` disparity i.e. libvips (Aptfile) + libpango (Cedar 14)

  pkg-config
  libpango-1.0-0
  libpangocairo-1.0-0
  libpangoft2-1.0-0
  libvips-dev
  glib2-dev
  ghostscript