diff --git a/Lib/distutils/command/build.py b/Lib/distutils/command/build.py
index 82a4e6c..bcbb933 100644
--- a/Lib/distutils/command/build.py
+++ b/Lib/distutils/command/build.py
@@ -10,7 +10,7 @@
 from distutils.core import Command
 
 
-class Build (Command):
+class build (Command):
 
     description = "build everything needed to install"
 
diff --git a/Lib/distutils/command/build_clib.py b/Lib/distutils/command/build_clib.py
index 6571281..749b0c2 100644
--- a/Lib/distutils/command/build_clib.py
+++ b/Lib/distutils/command/build_clib.py
@@ -26,7 +26,7 @@
 from distutils.ccompiler import new_compiler
 
 
-class BuildLib (Command):
+class build_lib (Command):
 
     options = [('debug', 'g',
                 "compile with debugging information"),
diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py
index 42eab47..ea0e294 100644
--- a/Lib/distutils/command/build_ext.py
+++ b/Lib/distutils/command/build_ext.py
@@ -20,7 +20,7 @@
     (r'^[a-zA-Z_][a-zA-Z_0-9]*(\.[a-zA-Z_][a-zA-Z_0-9]*)*$')
 
 
-class BuildExt (Command):
+class build_ext (Command):
     
     description = "build C/C++ extensions (compile/link to build directory)"
 
diff --git a/Lib/distutils/command/build_lib.py b/Lib/distutils/command/build_lib.py
index 6571281..749b0c2 100644
--- a/Lib/distutils/command/build_lib.py
+++ b/Lib/distutils/command/build_lib.py
@@ -26,7 +26,7 @@
 from distutils.ccompiler import new_compiler
 
 
-class BuildLib (Command):
+class build_lib (Command):
 
     options = [('debug', 'g',
                 "compile with debugging information"),
diff --git a/Lib/distutils/command/build_py.py b/Lib/distutils/command/build_py.py
index 048962b..f492ee3 100644
--- a/Lib/distutils/command/build_py.py
+++ b/Lib/distutils/command/build_py.py
@@ -14,7 +14,7 @@
 from distutils.errors import *
 
 
-class BuildPy (Command):
+class build_py (Command):
 
     description = "\"build\" pure Python modules (copy to build directory)"
 
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index 0e5b01c..b57ec6f 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -12,7 +12,7 @@
 from distutils.util import write_file
 
 
-class Install (Command):
+class install (Command):
 
     description = "install everything from build directory"
 
diff --git a/Lib/distutils/command/install_ext.py b/Lib/distutils/command/install_ext.py
index 599a37e..ba343d2 100644
--- a/Lib/distutils/command/install_ext.py
+++ b/Lib/distutils/command/install_ext.py
@@ -9,7 +9,7 @@
 from distutils.core import Command
 from distutils.util import copy_tree
 
-class InstallExt (Command):
+class install_ext (Command):
 
     description = "install C/C++ extension modules"
     
diff --git a/Lib/distutils/command/install_lib.py b/Lib/distutils/command/install_lib.py
index 2e8a670..e898ce0 100644
--- a/Lib/distutils/command/install_lib.py
+++ b/Lib/distutils/command/install_lib.py
@@ -6,7 +6,7 @@
 from distutils.core import Command
 from distutils.util import copy_tree
 
-class InstallPy (Command):
+class install_py (Command):
 
     description = "install pure Python modules"
 
diff --git a/Lib/distutils/command/install_py.py b/Lib/distutils/command/install_py.py
index 2e8a670..e898ce0 100644
--- a/Lib/distutils/command/install_py.py
+++ b/Lib/distutils/command/install_py.py
@@ -6,7 +6,7 @@
 from distutils.core import Command
 from distutils.util import copy_tree
 
-class InstallPy (Command):
+class install_py (Command):
 
     description = "install pure Python modules"
 
diff --git a/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index c8101a7..d890832 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -17,7 +17,7 @@
 from distutils.errors import DistutilsExecError
 
 
-class Sdist (Command):
+class sdist (Command):
 
     description = "create a source distribution (tarball, zip file, etc.)"