diff --git a/src/pylorax/__init__.py b/src/pylorax/__init__.py
index 53111728..433e1e1c 100644
--- a/src/pylorax/__init__.py
+++ b/src/pylorax/__init__.py
@@ -33,7 +33,6 @@ import sys
 import os
 import ConfigParser
 import tempfile
-import shutil
 import glob
 import math
 import subprocess
@@ -215,11 +214,10 @@ class Lorax(BaseLoraxClass):
         self.installtree.yum.process_transaction(skipbroken)
 
         # write .buildstamp
-        buildstamp = BuildStamp(self.workdir, self.product.name, self.product.version,
+        buildstamp = BuildStamp(self.product.name, self.product.version,
                                 self.product.bugurl, self.product.is_beta, self.arch.buildarch)
 
-        buildstamp.write()
-        shutil.copy2(buildstamp.path, self.installtree.root)
+        buildstamp.write(joinpaths(self.installtree.root, ".buildstamp"))
 
         logger.debug("saving pkglists to %s", self.workdir)
         dname = joinpaths(self.workdir, "pkglists")
@@ -273,13 +271,11 @@ class Lorax(BaseLoraxClass):
         self.installtree.get_anaconda_portions()
 
         # write .discinfo
-        discinfo = DiscInfo(self.workdir, self.product.release, self.arch.basearch)
-        discinfo.write()
-
-        shutil.copy2(discinfo.path, self.outputdir)
+        discinfo = DiscInfo(self.product.release, self.arch.basearch)
+        discinfo.write(joinpaths(self.outputdir, ".discinfo"))
 
         # create .treeinfo
-        treeinfo = TreeInfo(self.workdir, self.product.name, self.product.version,
+        treeinfo = TreeInfo(self.product.name, self.product.version,
                             self.product.variant, self.arch.basearch)
 
         # get the image class
@@ -318,9 +314,7 @@ class Lorax(BaseLoraxClass):
         logger.info("creating boot iso")
         i.create_boot(efiboot=None) # FIXME restore proper EFI function
 
-        treeinfo.write()
-
-        shutil.copy2(treeinfo.path, self.outputdir)
+        treeinfo.write(joinpaths(self.outputdir, ".treeinfo"))
 
     def get_buildarch(self):
         # get architecture of the available anaconda package
diff --git a/src/pylorax/buildstamp.py b/src/pylorax/buildstamp.py
index 20b62130..8d0915ea 100644
--- a/src/pylorax/buildstamp.py
+++ b/src/pylorax/buildstamp.py
@@ -23,14 +23,11 @@ import logging
 logger = logging.getLogger("pylorax.buildstamp")
 
 import datetime
-from sysutils import joinpaths
 
 
 class BuildStamp(object):
 
-    def __init__(self, workdir, product, version, bugurl, is_beta, buildarch):
-        self.path = joinpaths(workdir, ".buildstamp")
-
+    def __init__(self, product, version, bugurl, is_beta, buildarch):
         self.product = product
         self.version = version
         self.bugurl = bugurl
@@ -40,9 +37,9 @@ class BuildStamp(object):
         now = now.strftime("%Y%m%d%H%M")
         self.uuid = "{0}.{1}".format(now, buildarch)
 
-    def write(self):
+    def write(self, outfile):
         logger.info("writing .buildstamp file")
-        with open(self.path, "w") as fobj:
+        with open(outfile, "w") as fobj:
             fobj.write("[Main]\n")
             fobj.write("Product={0.product}\n".format(self))
             fobj.write("Version={0.version}\n".format(self))
diff --git a/src/pylorax/discinfo.py b/src/pylorax/discinfo.py
index 24f435f4..72c111ea 100644
--- a/src/pylorax/discinfo.py
+++ b/src/pylorax/discinfo.py
@@ -23,20 +23,17 @@ import logging
 logger = logging.getLogger("pylorax.discinfo")
 
 import time
-from sysutils import joinpaths
 
 
 class DiscInfo(object):
 
-    def __init__(self, workdir, release, basearch):
-        self.path = joinpaths(workdir, ".discinfo")
-
+    def __init__(self, release, basearch):
         self.release = release
         self.basearch = basearch
 
-    def write(self):
+    def write(self, outfile):
         logger.info("writing .discinfo file")
-        with open(self.path, "w") as fobj:
+        with open(outfile, "w") as fobj:
             fobj.write("{0:f}\n".format(time.time()))
             fobj.write("{0.release}\n".format(self))
             fobj.write("{0.basearch}\n".format(self))
diff --git a/src/pylorax/treeinfo.py b/src/pylorax/treeinfo.py
index 605c36e1..18626456 100644
--- a/src/pylorax/treeinfo.py
+++ b/src/pylorax/treeinfo.py
@@ -24,15 +24,13 @@ logger = logging.getLogger("pylorax.treeinfo")
 
 import ConfigParser
 import time
-from sysutils import joinpaths
 
 
 class TreeInfo(object):
 
-    def __init__(self, workdir, product, version, variant, basearch,
+    def __init__(self, product, version, variant, basearch,
                  packagedir=""):
 
-        self.path = joinpaths(workdir, ".treeinfo")
         self.c = ConfigParser.ConfigParser()
 
         section = "general"
@@ -52,7 +50,7 @@ class TreeInfo(object):
 
         map(lambda (key, value): self.c.set(section, key, value), data.items())
 
-    def write(self):
+    def write(self, outfile):
         logger.info("writing .treeinfo file")
-        with open(self.path, "w") as fobj:
+        with open(outfile, "w") as fobj:
             self.c.write(fobj)