diff --git a/pym/update/emerge_parser.py b/pym/update/emerge_parser.py
index 1cafe04..4f150a5 100644
--- a/pym/update/emerge_parser.py
+++ b/pym/update/emerge_parser.py
@@ -207,18 +207,22 @@ class InstallPackagesBlock(EmergeInformationBlock):
     """
     list = PackageList([])
     remove_list = PackageList([])
+    block_packages = False
     _new_line = EmergeInformationBlock._new_line
+    _color_block = EmergeInformationBlock._color_block
     token = "\n["
     end_token = ["\r\n\r", "\n\n"]
 
     re_block = re.compile(r"((?:^\[.*?{nl})+)".format(nl=_new_line),
                           re.MULTILINE)
+    re_blocks = re.compile(r"\[{c}blocks{c} {c}b".format(c=_color_block))
 
     def get_data(self, match):
         super(InstallPackagesBlock, self).get_data(match)
         list_block = XmlConverter().transform(self.result).split('\n')
         self.list = PackageList(map(EmergeUpdateInfo, list_block))
         self.remove_list = PackageList(map(EmergeRemoveInfo, list_block))
+        self.block_packages = any(self.re_blocks.search(x) for x in list_block)
 
 
 class UninstallPackagesBlock(EmergeInformationBlock):
diff --git a/pym/update/update.py b/pym/update/update.py
index aa81fc9..7dde4c7 100644
--- a/pym/update/update.py
+++ b/pym/update/update.py
@@ -728,6 +728,9 @@ class Update(object):
                     if emerge.install_packages.remove_list:
                         self.emerge_cache.drop_cache(
                             "List has packages for remove")
+                    elif emerge.install_packages.block_packages:
+                        self.emerge_cache.drop_cache(
+                            "List has block packages")
                     else:
                         self.updateCache(emerge.install_packages.list)
                 if not emerge.install_packages.list: