diff --git a/src/pypungi/__init__.py b/src/pypungi/__init__.py
index 88f29753..e719f1a4 100644
--- a/src/pypungi/__init__.py
+++ b/src/pypungi/__init__.py
@@ -215,7 +215,9 @@ class Pungi(pypungi.PungiBase):
         self.sourcerpm_srpmpo_map = {}
 
         # flags
-        self.input_packages = set()     # packages specified in the input list (%packages section in kickstart)
+        self.input_packages = set()         # packages specified in %packages kickstart section including those defined via comps groups
+        self.comps_packages = set()         # packages specified in %packages kickstart section *indirectly* via comps groups
+        self.prepopulate_packages = set()   # packages specified in %prepopulate kickstart section
         self.fulltree_packages = set()
         self.langpack_packages = set()
         self.multilib_packages = set()
@@ -697,13 +699,19 @@ class Pungi(pypungi.PungiBase):
             for group in self._addDefaultGroups(excludeGroups):
                 self.ksparser.handler.packages.add(['@%s' % group])
 
-
         # Get a list of packages from groups
+        comps_package_names = set()
         for group in self.ksparser.handler.packages.groupList:
-            searchlist.extend(self.getPackagesFromGroup(group))
+            comps_package_names.update(self.getPackagesFromGroup(group))
+        searchlist.extend(sorted(comps_package_names))
 
-        # Add the adds
+        # Add packages
         searchlist.extend(self.ksparser.handler.packages.packageList)
+        input_packages = searchlist[:]
+
+        # Add prepopulate packages
+        prepopulate_packages = self.ksparser.handler.prepopulate
+        searchlist.extend(prepopulate_packages)
 
         # Make the search list unique
         searchlist = yum.misc.unique(searchlist)
@@ -745,11 +753,17 @@ class Pungi(pypungi.PungiBase):
                     # works for both "none" and "build" greedy methods
                     packages = [self.ayum._bestPackageFromList(packages)]
 
-                self.input_packages.update(packages)
+                if name in input_packages:
+                    self.input_packages.update(packages)
+                if name in comps_package_names:
+                    self.comps_packages.update(packages)
 
                 for po in packages:
                     msg = 'Found %s.%s' % (po.name, po.arch)
                     self.add_package(po, msg)
+                    name_arch = "%s.%s" % (po.name, po.arch)
+                    if name_arch in prepopulate_packages:
+                        self.prepopulate_packages.add(po)
 
         if not self.po_list:
             raise RuntimeError("No packages found")
@@ -1113,6 +1127,14 @@ class Pungi(pypungi.PungiBase):
             if po in self.input_packages:
                 flags.append("input")
 
+            # comps
+            if po in self.comps_packages:
+                flags.append("comps")
+
+            # prepopulate
+            if po in self.prepopulate_packages:
+                flags.append("prepopulate")
+
             # langpack
             if po in self.langpack_packages:
                 flags.append("langpack")
diff --git a/src/pypungi/ks.py b/src/pypungi/ks.py
index 6734d9d9..53f7520b 100644
--- a/src/pypungi/ks.py
+++ b/src/pypungi/ks.py
@@ -2,16 +2,58 @@
 
 
 """
-Kickstart syntax is extended with:
+Pungi adds several new sections to kickstarts.
 
+
+FULLTREE EXCLUDES
+-----------------
+Fulltree excludes allow us to define SRPM names
+we don't want to be part of fulltree processing.
+
+Syntax:
 %fulltree-excludes
 <srpm_name>
 <srpm_name>
 ...
 %end
 
-Fulltree excludes allow us to define SRPM names
-we don't want to be part of fulltree processing.
+
+MULTILIB BLACKLIST
+------------------
+List of RPMs which are prevented from becoming multilib.
+
+Syntax:
+%multilib-blacklist
+<rpm_name>
+<rpm_name>
+...
+%end
+
+
+MULTILIB WHITELIST
+------------------
+List of RPMs which will become multilib (but only if native package is pulled in).
+
+Syntax:
+%multilib-whitelist
+<rpm_name>
+<rpm_name>
+...
+%end
+
+
+PREPOPULATE
+-----------
+To make sure no package is left behind between 2 composes,
+we can explicitly add <name>.<arch> records to the %prepopulate section.
+These will be added to the input list and marked with 'prepopulate' flag.
+
+Syntax:
+%prepopulate
+<rpm_name>.<rpm_arch>
+<rpm_name>.<rpm_arch>
+...
+%end
 """
 
 
@@ -58,12 +100,26 @@ class MultilibWhitelistSection(pykickstart.sections.Section):
         self.handler.multilib_whitelist.add(line)
 
 
+class PrepopulateSection(pykickstart.sections.Section):
+    sectionOpen = "%prepopulate"
+
+    def handleLine(self, line):
+        if not self.handler:
+            return
+
+        (h, s, t) = line.partition('#')
+        line = h.rstrip()
+
+        self.handler.prepopulate.add(line)
+
+
 class KickstartParser(pykickstart.parser.KickstartParser):
     def setupSections(self):
         pykickstart.parser.KickstartParser.setupSections(self)
         self.registerSection(FulltreeExcludesSection(self.handler))
         self.registerSection(MultilibBlacklistSection(self.handler))
         self.registerSection(MultilibWhitelistSection(self.handler))
+        self.registerSection(PrepopulateSection(self.handler))
 
 
 HandlerClass = pykickstart.version.returnClassForVersion()
@@ -73,6 +129,7 @@ class PungiHandler(HandlerClass):
         self.fulltree_excludes = set()
         self.multilib_blacklist = set()
         self.multilib_whitelist = set()
+        self.prepopulate = set()
 
 
 def get_ksparser(ks_path=None):