diff -up src/sage/groups/perm_gps/permgroup.py.orig src/sage/groups/perm_gps/permgroup.py
--- src/sage/groups/perm_gps/permgroup.py.orig	2016-08-08 13:39:39.617543700 -0400
+++ src/sage/groups/perm_gps/permgroup.py	2016-08-08 13:40:16.291545105 -0400
@@ -145,7 +145,6 @@ from sage.groups.perm_gps.permgroup_elem
 from sage.groups.abelian_gps.abelian_group import AbelianGroup
 from sage.misc.cachefunc import cached_method
 from sage.groups.class_function import ClassFunction
-from sage.misc.package import is_package_installed
 from sage.sets.finite_enumerated_set import FiniteEnumeratedSet
 from sage.categories.all import FiniteEnumeratedSets
 from sage.groups.conjugacy_classes import ConjugacyClassGAP
@@ -190,8 +189,7 @@ def hap_decorator(f):
     """
     @wraps(f)
     def wrapped(self, n, p=0):
-        if not is_package_installed('gap_packages'):
-            raise RuntimeError("You must install the optional gap_packages package.")
+        raise RuntimeError("You must install the optional gap_packages package.")
         load_hap()
         from sage.arith.all import is_prime
         if not (p == 0 or is_prime(p)):
@@ -1683,9 +1681,7 @@ class PermutationGroup_generic(group.Fin
         try:
             return [Integer(n) for n in self._gap_().IdGroup()]
         except RuntimeError:
-            if not is_package_installed('database_gap'):
-                raise RuntimeError("You must install the optional database_gap package first.")
-            raise
+            raise RuntimeError("You must install the optional database_gap package first.")
 
     def id(self):
         """
@@ -1736,9 +1732,7 @@ class PermutationGroup_generic(group.Fin
         try:
             return Integer(self._gap_().PrimitiveIdentification())
         except RuntimeError:
-            if not is_package_installed('database_gap'):
-                raise RuntimeError("You must install the optional database_gap package first.")
-            raise
+            raise RuntimeError("You must install the optional database_gap package first.")
 
     def center(self):
         """
@@ -4114,8 +4108,7 @@ class PermutationGroup_generic(group.Fin
         - David Joyner and Graham Ellis
 
         """
-        if not is_package_installed('gap_packages'):
-            raise RuntimeError("You must install the optional gap_packages package.")
+        raise RuntimeError("You must install the optional gap_packages package.")
         load_hap()
         from sage.arith.all import is_prime
         if not (p == 0 or is_prime(p)):