diff --git a/configure/os/CONFIG_SITE.darwinCommon.darwinCommon b/configure/os/CONFIG_SITE.darwinCommon.darwinCommon
index edef3938a..297fd8e4f 100644
--- a/configure/os/CONFIG_SITE.darwinCommon.darwinCommon
+++ b/configure/os/CONFIG_SITE.darwinCommon.darwinCommon
@@ -3,15 +3,21 @@
 # Site specific definitions for darwin builds
 #-------------------------------------------------------
 
-# Uncomment the following two definitions to enable the use of DarwinPorts packages.
-#
+# Note the dir/firstword/wildcard functions below are used
+# to avoid warnings about missing directories.
+
+# Mix-and-match of different package systems is probably not advisable,
+# but you can try that if you like...
+
+# Uncomment these definitions when using Homebrew packages:
+#OP_SYS_INCLUDES += -I/usr/local/include
+#OP_SYS_LDFLAGS += $(addprefix -L,$(dir $(firstword $(wildcard /usr/local/lib/*))))
+
+# Uncomment these definitions when using 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/*))))
+#OP_SYS_LDFLAGS += $(addprefix -L,$(dir $(firstword $(wildcard /opt/local/lib/*))))
 
-# Uncomment the following two definitions to enable the use of Fink packages.
-#
+# Uncomment these definitions when using 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/*))))
+#OP_SYS_LDFLAGS += $(addprefix -L,$(dir $(firstword $(wildcard /sw/lib/*))))