Source: liblouis Version: 1.7.0-1 Severity: important User: debian-python@lists.debian.org Usertags: python2.4-removal Your package build-depends or depends on packages built on top of ctypes source package, which is scheduled to be removed soon due to python2.4 removal. ctypes is already part of standard library since Python 2.5, so you should remove its packages from Build-Depends or Depends and bump python to be at least >= 2.5.