diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index 09105a2..b4dcca7 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -912,9 +912,9 @@
                       ("Tk", "tk-8*", "license.terms"),
                       ("Tix", "tix-*", "license.terms")):
         out.write("\nThis copy of Python includes a copy of %s, which is licensed under the following terms:\n\n" % name)
-        dirs = glob.glob(srcdir+"/../"+pat)
+        dirs = glob.glob(srcdir+"/externals/"+pat)
         if not dirs:
-            raise ValueError, "Could not find "+srcdir+"/../"+pat
+            raise ValueError, "Could not find "+srcdir+"/externals/"+pat
         if len(dirs) > 2:
             raise ValueError, "Multiple copies of "+pat
         dir = dirs[0]
@@ -1117,7 +1117,7 @@
             lib.start_component("TkDLLs", tcltk)
             lib.add_file("_tkinter.pyd")
             dlls.append("_tkinter.pyd")
-            tcldir = os.path.normpath(srcdir+("/../tcltk%s/bin" % tclsuffix))
+            tcldir = os.path.normpath(srcdir+("/externals/tcltk%s/bin" % tclsuffix))
             for f in glob.glob1(tcldir, "*.dll"):
                 lib.add_file(f, src=os.path.join(tcldir, f))
     # check whether there are any unknown extensions
@@ -1141,7 +1141,7 @@
         lib.add_file('libpython%s%s.a' % (major, minor))
     if have_tcl:
         # Add Tcl/Tk
-        tcldirs = [(root, '../tcltk%s/lib' % tclsuffix, 'tcl')]
+        tcldirs = [(root, 'externals/tcltk%s/lib' % tclsuffix, 'tcl')]
         tcltk.set_current()
         while tcldirs:
             parent, phys, dir = tcldirs.pop()
diff --git a/Tools/msi/uuids.py b/Tools/msi/uuids.py
index 2e4dc31..d8c426a 100644
--- a/Tools/msi/uuids.py
+++ b/Tools/msi/uuids.py
@@ -66,4 +66,6 @@
     '2.7.7121':'{5E0D187D-238B-4e96-9C75-C4CF141F5385}', # 2.7.7rc1
     '2.7.7150':'{049CA433-77A0-4e48-AC76-180A282C4E10}', # 2.7.7
     '2.7.8150':'{61121B12-88BD-4261-A6EE-AB32610A56DD}', # 2.7.8
+    '2.7.9121':'{AAB1E8FF-6D00-4409-8F13-BE365AB92FFE}', # 2.7.9rc1
+    '2.7.9150':'{79F081BF-7454-43DB-BD8F-9EE596813232}', # 2.7.9
 }