diff --git a/Xlib/ext/randr.py b/Xlib/ext/randr.py
index 9cbfe2d..515703b 100644
--- a/Xlib/ext/randr.py
+++ b/Xlib/ext/randr.py
@@ -36,6 +36,7 @@
 
 from Xlib import X
 from Xlib.protocol import rq
+from Xlib.error import XError
 
 extname = 'RANDR'
 
@@ -123,11 +124,11 @@
 BadRRMode                   = 2
 
 # Error classes #
-class BadRROutputError(Exception): pass
+class BadRROutputError(XError): pass
 
-class BadRRCrtcError(Exception): pass
+class BadRRCrtcError(XError): pass
 
-class BadRRModeError(Exception): pass
+class BadRRModeError(XError): pass
 
 # Data Structures #
 
diff --git a/setup.py b/setup.py
index 71bdb08..1ef3152 100644
--- a/setup.py
+++ b/setup.py
@@ -1,17 +1,9 @@
 # Distutils script for python-xlib
 
-from pkg_resources import parse_requirements
-from setuptools import (__version__ as setuptools_version, setup)
-
-
-# Check setuptools is recent enough to support `setup.cfg`.
-setuptools_require = next(parse_requirements('setuptools>=30.3.0'))
-assert setuptools_version in setuptools_require, '{} is required'.format(setuptools_require)
-
+from setuptools import setup
 
 setup(
     install_requires=['six>=1.10.0'],
-    setup_requires=['setuptools-scm'],
     packages=[
         'Xlib',
         'Xlib.ext',