[sdevijver]

Couldn't get sifflet installed:

  ~$ cabal fetch sifflet
  Resolving dependencies...
  cabal: cannot configure pango-0.11.2. It requires cairo >=0.11.1 && <0.12 and
  glib >=0.11.1 && <0.12
  For the dependency on cairo >=0.11.1 && <0.12 there are these packages:
  cairo-0.11.1. However none of them are available.
  cairo-0.11.1 was excluded because sifflet-lib-1.0 requires cairo ==0.11.0
  cairo-0.11.1 was excluded because cairo-0.11.0 was selected instead
  cairo-0.11.1 was excluded because sifflet-1.0 requires   cairo ==0.11.0
  For the dependency on glib >=0.11.1 && <0.12 there are these packages:
  glib-0.11.1. However none of them are available.
  glib-0.11.1 was excluded because sifflet-lib-1.0 requires glib ==0.11.0
  glib-0.11.1 was excluded because glib-0.11.0 was selected instead
  glib-0.11.1 was excluded because sifflet-1.0 requires   glib ==0.11.0