File project.diff of Package m4

--- m4.spec.orig
+++ m4.spec
@@ -27,7 +27,7 @@ Version:        1.4.12
 Release:        1
 Summary:        GNU m4
 Url:            http://www.gnu.org/software/m4/
-Source:         ftp://ftp.gnu.org/pub/gnu/m4/m4-%{version}.tar.lzma
+Source:         ftp://ftp.gnu.org/pub/gnu/m4/m4-%{version}.tar.bz2
 Patch:          m4-%{version}.diff
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  lzma