Lets have another try at getting the Windows buildbots in a consistent state before rebuilding using the new process.
diff --git a/Tools/buildbot/external.bat b/Tools/buildbot/external.bat
index ae18ead..4113605 100644
--- a/Tools/buildbot/external.bat
+++ b/Tools/buildbot/external.bat
@@ -1,46 +1,17 @@
 @rem Fetches (and builds if necessary) external dependencies

 

 @rem Assume we start inside the Python source directory

-cd ..

-call "%VS90COMNTOOLS%vsvars32.bat"

+call "Tools\buildbot\external-common.bat"

+call "%VS90COMNTOOLS%\vsvars32.bat"

 

-@rem bzip

-if not exist bzip2-1.0.3 svn export http://svn.python.org/projects/external/bzip2-1.0.3

-

-@rem Sleepycat db

-@rem Remove VS 2003 builds

-if exist db-4.4.20 if not exist db-4.4.20\build_win32\this_is_for_vs9 (

-   echo Removing old build

-   rd /s/q db-4.4.20

-)

-if not exist db-4.4.20 svn export http://svn.python.org/projects/external/db-4.4.20-vs9 db-4.4.20

-if not exist db-4.4.20\build_win32\debug\libdb44sd.lib (

-   vcbuild db-4.4.20\build_win32\db_static.vcproj "Debug|Win32"

+if not exist tcltk\bin\tcl84g.dll (

+    cd tcl-8.4.18.2\win

+    nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500 DEBUG=1 INSTALLDIR=..\..\tcltk clean all install

+    cd ..\..

 )

 

-@rem OpenSSL

-if not exist openssl-0.9.8g (

-  if exist openssl-0.9.8a rd /s/q openssl-0.9.8a

-  svn export http://svn.python.org/projects/external/openssl-0.9.8g

+if not exist tcltk\bin\tk84g.dll (

+    cd tk-8.4.18.1\win    

+    nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500 DEBUG=1 INSTALLDIR=..\..\tcltk TCLDIR=..\..\tcl-8.4.18.2 clean all install

+    cd ..\..

 )

-

-@rem tcltk

-if not exist tcl8.4.16 (

-   if exist tcltk rd /s/q tcltk

-   if exist tcl8.4.12 rd /s/q tcl8.4.12

-   if exist tk8.4.12 rd /s/q tk8.4.12

-   svn export http://svn.python.org/projects/external/tcl8.4.16

-   svn export http://svn.python.org/projects/external/tk8.4.16

-   cd tcl8.4.16\win

-   nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500

-   nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500 INSTALLDIR=..\..\tcltk install

-   cd ..\..

-   cd tk8.4.16\win

-   nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500 TCLDIR=..\..\tcl8.4.16

-   nmake -f makefile.vc COMPILERFLAGS=-DWINVER=0x0500 TCLDIR=..\..\tcl8.4.16 INSTALLDIR=..\..\tcltk install

-   cd ..\..

-)

-

-@rem sqlite

-if not exist sqlite-source-3.3.4 svn export http://svn.python.org/projects/external/sqlite-source-3.3.4

-if not exist build\PCbuild\sqlite3.dll copy sqlite-source-3.3.4\sqlite3.dll build\PCbuild