# Exim distribution directory before running the "make" command.
# Things that depend on the operating system have default settings in
-# OS/Makefile-Default, but these are overridden for some OS by files called
-# called OS/Makefile-<osname>. You can further override these by creating files
-# called Local/Makefile-<osname>, where "<osname>" stands for the name of your
-# operating system - look at the names in the OS directory to see which names
-# are recognized.
+# OS/Makefile-Default, but these are overridden for some OS by files
+# called called OS/Makefile-<osname>. You can further override these by
+# creating files called Local/Makefile-<osname>, and
+# Local/Makefile-<buildname> (where "<osname>" stands for the name of
+# your operating system - look at the names in the OS directory to see
+# which names are recognized, and "<buildname>" is derived from the
+# environment variable "build")
# However, if you are building Exim for a single OS only, you don't need to
# worry about setting up Local/Makefile-<osname>. Any build-time configuration