https://github.com/dlbeer/mspdebug/commit/6c82bbf017283f442d2b4f6a6ee2771d96893ac2

diff --git a/Makefile b/Makefile
index 89851f0..5a48980 100644
--- Makefile
+++ Makefile
@@ -72,6 +72,9 @@ else
       else ifeq ($(shell brew --version > /dev/null 2>&1 && echo ok),ok)
 	PORTS_CFLAGS := $(shell pkg-config --cflags hidapi)
 	PORTS_LDFLAGS := $(shell pkg-config --libs hidapi) -framework IOKit -framework CoreFoundation
+      else ifeq ($(shell port version > /dev/null 2>&1 && echo ok),ok)
+	PORTS_CFLAGS := $(shell pkg-config --cflags hidapi libusb)
+	PORTS_LDFLAGS := $(shell pkg-config --libs hidapi libusb) -framework IOKit -framework CoreFoundation
       else
 	PORTS_CFLAGS := -I/opt/local/include
 	PORTS_LDFLAGS := -L/opt/local/lib -lhidapi -framework IOKit -framework CoreFoundation