be explicit about the actual location of the missing file
diff --git a/Lib/distutils/dep_util.py b/Lib/distutils/dep_util.py
index c139c85..2c6d792 100644
--- a/Lib/distutils/dep_util.py
+++ b/Lib/distutils/dep_util.py
@@ -19,7 +19,8 @@
Raise DistutilsFileError if 'source' does not exist.
"""
if not os.path.exists(source):
- raise DistutilsFileError, "file '%s' does not exist" % source
+ raise DistutilsFileError, ("file '%s' does not exist" %
+ os.path.abspath(source))
if not os.path.exists(target):
return 1