diff --git a/src/pylorax/treebuilder.py b/src/pylorax/treebuilder.py
index 10b18c70..64ef3b92 100644
--- a/src/pylorax/treebuilder.py
+++ b/src/pylorax/treebuilder.py
@@ -195,8 +195,7 @@ class TreeBuilder(object):
         '''Rebuild all the initrds in the tree. If backup is specified, each
         initrd will be renamed with backup as a suffix before rebuilding.
         If backup is empty, the existing initrd files will be overwritten.'''
-        dracut = ["dracut", "--prefix=/run/initramfs",
-                  "--nomdadmconf", "--nolvmconf"] + add_args
+        dracut = ["dracut", "--nomdadmconf", "--nolvmconf"] + add_args
         if not backup:
             dracut.append("--force")