diff --git a/.gitignore b/.gitignore
index 064e58b..3e085f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 haggis
-config.mk
 test/output/
 test/*
 !test/*.c
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..7dee87b
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,5 @@
+prefix ?= /usr/local
+# Comment this line if your OS ships libmd as part of libc
+# (NetBSD, OpenBSD)
+LIBS   += -lmd
+LIBS   += -lpthread
diff --git a/haggis.c b/haggis.c
index a73b2a7..b1b97b3 100644
--- a/haggis.c
+++ b/haggis.c
@@ -32,9 +32,7 @@
 
 #include <errno.h>
 #include <limits.h>          // PATH_MAX
-#include <stddef.h>
 #include <stdint.h>          // uint<x>_t
-#include <sys/syslimits.h>
 
 #if defined(__FreeBSD__) || defined(__DragonFly__)
 #include <sha.h>