diff --git a/ChangeLog b/ChangeLog
index abf98eca..fcd7837d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-06-06 Ozan Çağlayan <ozan@pardus.org.tr>
+		* (operations/build.py): Sort the files according to their path names
+		before adding them to the tarfile. This helps lzma to compress the
+		install.tar better. Thanks Onur for noticing this and giving the idea.
+
 2009-05-07 Bahadır Kandemir <bahadir@pardus.org.tr>
         * Set DBus timeout for setupPackage calls.
 
diff --git a/pisi/operations/build.py b/pisi/operations/build.py
index 572280b9..4c8106f3 100644
--- a/pisi/operations/build.py
+++ b/pisi/operations/build.py
@@ -965,6 +965,11 @@ class Builder:
             files = pisi.files.Files()
             files.read(ctx.const.files_xml)
 
+            # Sort the files in-place according to their path for an ordered
+            # tarfile layout which dramatically improves the compression performance
+            # of lzma.
+            files.list.sort(key=lambda x: x.path)
+
             if ctx.get_option('package_format') == "1.0":
                 for finfo in files.list:
                     orgname = arcname = pisi.util.join_path("install", finfo.path)