diff -up src/sage/geometry/polyhedron/base.py.orig src/sage/geometry/polyhedron/base.py
--- src/sage/geometry/polyhedron/base.py.orig	2017-04-11 09:57:57.498266411 -0400
+++ src/sage/geometry/polyhedron/base.py	2017-04-11 09:58:07.176266782 -0400
@@ -22,7 +22,6 @@ import six
 from sage.structure.element import Element, coerce_binop, is_Vector
 
 from sage.misc.all import cached_method, prod
-from sage.misc.package import is_package_installed
 
 from sage.rings.all import QQ, ZZ
 from sage.rings.real_double import RDF
@@ -3988,10 +3987,6 @@ class Polyhedron_base(Element):
 
              David Avis's lrs program.
         """
-        if not is_package_installed('lrslib'):
-            raise NotImplementedError('You must install the optional lrslib package '
-                                       'for this function to work')
-
         from sage.misc.temporary_file import tmp_filename
         from subprocess import Popen, PIPE
         in_str = self.cdd_Vrepresentation()