diff --git a/configure/os/CONFIG.darwinCommon.darwinCommon b/configure/os/CONFIG.darwinCommon.darwinCommon
index 2244276c6..dd794a02d 100644
--- a/configure/os/CONFIG.darwinCommon.darwinCommon
+++ b/configure/os/CONFIG.darwinCommon.darwinCommon
@@ -52,20 +52,6 @@ OP_SYS_CPPFLAGS += -Ddarwin
 OPT_CFLAGS_YES += -g
 OPT_CXXFLAGS_YES += -g
 
-#
-# The following two definitions enable the use of DarwinPorts packages.
-#
-OP_SYS_INCLUDES += -I/opt/local/include
-# dir/firstword/wildcard used to avoid warning -L: directory name (...) does not exist
-OP_SYS_LDFLAGS +=  $(addprefix -L,$(dir $(firstword $(wildcard /opt/local/lib/*))))
-
-#
-# The following two definitions enable the use of Fink packages.
-#
-OP_SYS_INCLUDES += -I/sw/include
-# dir/firstword/wildcard used to avoid warning -L: directory name (...) does not exist
-OP_SYS_LDFLAGS +=  $(addprefix -L,$(dir $(firstword $(wildcard /sw/lib/*))))
-
 #
 # Libraries for command-line editing.
 #
diff --git a/configure/os/CONFIG_SITE.darwinCommon.darwinCommon b/configure/os/CONFIG_SITE.darwinCommon.darwinCommon
new file mode 100644
index 000000000..e1690ba09
--- /dev/null
+++ b/configure/os/CONFIG_SITE.darwinCommon.darwinCommon
@@ -0,0 +1,20 @@
+# CONFIG_SITE.darwinCommon.darwinCommon
+#
+# $Revision-Id$
+# This file is maintained by the build community.
+#
+# Site specific definitions for darwin builds
+#-------------------------------------------------------
+
+# Uncomment the following two definitions to enable the use of DarwinPorts packages.
+#
+#OP_SYS_INCLUDES += -I/opt/local/include
+# dir/firstword/wildcard used to avoid warning -L: directory name (...) does not exist
+#OP_SYS_LDFLAGS +=  $(addprefix -L,$(dir $(firstword $(wildcard /opt/local/lib/*))))
+
+# Uncomment the following two definitions to enable the use of Fink packages.
+#
+#OP_SYS_INCLUDES += -I/sw/include
+# dir/firstword/wildcard used to avoid warning -L: directory name (...) does not exist
+#OP_SYS_LDFLAGS +=  $(addprefix -L,$(dir $(firstword $(wildcard /sw/lib/*))))
+