diff --git a/src/pylorax/images.py b/src/pylorax/images.py
index 455fe57e..ee8ffe8a 100644
--- a/src/pylorax/images.py
+++ b/src/pylorax/images.py
@@ -329,11 +329,10 @@ class PPC(object):
                "-sysid", "PPC", "-V", '"PBOOT"',
                "-volset", '"%s"' % self.version, "-volset-size", "1",
                "-volset-seqno", "1"] + macboot + \
-              ["-map", MAPPING, "-magic", MAGIC,
+              ["-map", joinpaths(self.installtree.root, MAPPING),
+               "-magic", joinpaths(self.installtree.root, MAGIC),
                "-no-desktop", "-allow-multidot", "-graft-points", isopathdir]
 
-        logger.debug("running: %s" % cmd)
-
         p = subprocess.Popen(cmd, stdin=subprocess.PIPE,
                              stdout=subprocess.PIPE)
         p.wait()