diff --git a/mpcdf_common.py b/mpcdf_common.py
index 6ab446d5ed0c23e16a40c4827387a7faa2c55489..fc058a5a220b88c2bd9e8fa06ebed906f282d21a 100644
--- a/mpcdf_common.py
+++ b/mpcdf_common.py
@@ -904,7 +904,7 @@ Macros:
             new.write(s2)
             new.close()
 
-            call(["diff", "-s", "-u", old.name, "--label", "old-prjconf", new.name, "--label", "new-prjconf"])
+            call(["diff", "--color=auto", "-s", "-u", old.name, "--label", label1, new.name, "--label", label2])
             os.unlink(old.name)
             os.unlink(new.name)
 
diff --git a/mpcdf_setup_home_project.py b/mpcdf_setup_home_project.py
index bda9462d04b835f72d69c83c9900fd820317de64..c85b88e9b54092e2803197a24877a352779f244e 100644
--- a/mpcdf_setup_home_project.py
+++ b/mpcdf_setup_home_project.py
@@ -11,10 +11,14 @@ import osc.cmdln
 
 @osc.cmdln.option('-n', '--dry-run', action="store_true",
                   help="Do not actually run anything but output the resulting XML configuration")
+@osc.cmdln.option('--diff', action="store_true",
+                  help="Show (only) differences of prjconf and project meta")
 @osc.cmdln.option('--remove-old', action="store_true", default=False,
                   help="Remove all obsolete repositories instead of only disabling builds for packages there")
 @osc.cmdln.option('--remove-old-matching', default=None,
                   help="Remove all obsolete repositories matching this regular expression")
+@osc.cmdln.option('--only-project', action="store_true",
+                  help="Only change project metadata, do not iterate over packages and change their enabled repositories")
 @osc.cmdln.option('--distribution', metavar="DIST", nargs=1,
                   help="Base distribution, necessary argument unless set previously for this project. "
                        "Valid arguments are the names of any repository in the 'software' project.")