diff --git a/i18n/cl_builder_ru.mo b/i18n/cl_builder_ru.mo
index 9d6b44b..23573fa 100644
Binary files a/i18n/cl_builder_ru.mo and b/i18n/cl_builder_ru.mo differ
diff --git a/pym/cl_builder.py b/pym/cl_builder.py
index f0bf9c5..b777c53 100644
--- a/pym/cl_builder.py
+++ b/pym/cl_builder.py
@@ -434,6 +434,12 @@ class cl_builder(color_print):
         self.printMessageForTest(_("Creating installed package list"))
         self.printByResult(self.createPackageList(sourceDirectory,
                            isoFile[:-4]+".list"))
+        self.printMessageForTest(_("Creating mask list"))
+        self.printByResult(self.createMaskList(sourceDirectory,
+                           isoFile[:-4]+".mask"))
+        self.printMessageForTest(_("Creating unmask list"))
+        self.printByResult(self.createUnmaskList(sourceDirectory,
+                           isoFile[:-4]+".unmask"))
         self.printMessageForTest(_("Creating DIGESTS file"))
         self.printByResult(self.createDigest(isoFile,isoFile+".DIGESTS"))
 
@@ -650,6 +656,38 @@ class cl_builder(color_print):
             return False
         return True
 
+    def createMaskList(self,chrootdir,filename):
+        """Create package mask list by chrootdir"""
+        pkgdir = path.join(chrootdir,'var/db/pkg')
+        reVerSplit = re.compile(r"^(.*?)-(([^-]+?)(?:-(r\d+))?)$",re.S)
+        if not path.exists(chrootdir):
+            return False
+        try:
+            packageList = sorted(reduce(lambda x,y:x+map(lambda x:path.join(y,x),
+                os.listdir(path.join(pkgdir,y))), os.listdir(pkgdir),[]))
+            open(filename,'w').writelines(
+                map(lambda x:"%s\n"%x,
+                map(lambda x:x.groups()[0],
+                filter(lambda x:x,
+                map(reVerSplit.search,
+                packageList)))))
+        except (IOError,OSError),e:
+            return False
+        return True
+
+    def createUnmaskList(self,chrootdir,filename):
+        """Create package unmask list by chrootdir"""
+        pkgdir = path.join(chrootdir,'var/db/pkg')
+        if not path.exists(chrootdir):
+            return False
+        try:
+            packageList = sorted(reduce(lambda x,y:x+map(lambda x:path.join(y,x),
+                os.listdir(path.join(pkgdir,y))), os.listdir(pkgdir),[]))
+            open(filename,'w').writelines(map(lambda x:"=%s\n"%x,packageList))
+        except (IOError,OSError),e:
+            return False
+        return True
+
     def createDigest(self,filename,digestfile):
         """Create file with digest"""
         template = """# %(alg)s HASH\n%(digest)s  %(filename)s\n"""