diff --git a/Makefile b/Makefile
index 7d0826d..137b0ca 100644
--- a/Makefile
+++ b/Makefile
@@ -4,8 +4,7 @@ FLAGS  = -D_GNU_SOURCE -include bsd/string.h
 
 LIBS  += -ltinfo -lbsd
 
-topdir=../..
-include $(topdir)/config.mk
+include config.mk
 
 install-2:
 	(cd $(bindir); ln -sf ncal cal)
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..05cb0ec
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,56 @@
+# config.mk
+# $Id$
+
+# Configuration variables for bsdmainutils build system. These variables
+# can be set here or through the environment.
+CC      ?= cc
+CFLAGS  ?= -O2 -g
+DESTDIR ?=
+
+# Each directory in usr.bin has the following targets avaiable: (none),
+# install, clean. These targets also exist in the top level Makefile.
+
+# Programs are able to specify additional libraries to link against, and
+# are able to specify additional installation rules.
+#  * To set additional linker flags, set the LDFLAGS variable in the
+#    program Makefile.
+#  * To specify a non-standard manpage, set the MAN variable.
+#  * To add post-installation commands, define an install-2 target.
+#  * To add additional sources, set the SRC variable.
+
+# setup some defaults
+SRC ?= $(PROG).c
+MAN ?= $(PROG).1
+
+sysconfdir=$(DESTDIR)/etc
+datadir=$(DESTDIR)/usr/share
+bindir=$(DESTDIR)/usr/bin
+mandir=$(datadir)/man/man1
+
+# rule for building the program
+ifneq ($(findstring .sh,$(SRC)),)
+$(PROG): $(SRC)
+	cp $< $@
+	chmod 0755 $@
+else
+objs=$(subst .c,.o,$(SRC))
+$(PROG): $(objs)
+	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+endif
+
+.c.o:
+	$(CC) -include freebsd.h $(FLAGS) $(CFLAGS) -c -o $@ $<
+
+# normal installation rule
+install-1: $(PROG)
+	install -o root -g root -m 755 $(PROG) $(bindir)
+	install -o root -g root -m 644 $(MAN) $(mandir)
+
+install: install-1 install-2
+
+clean:
+	-rm -f $(PROG) *.o
+
+.PHONY: install-1 install-2 install clean
+
+# vim:sw=4:ts=4:
diff --git a/freebsd.h b/freebsd.h
new file mode 100644
index 0000000..cf55853
--- /dev/null
+++ b/freebsd.h
@@ -0,0 +1,8 @@
+#ifndef _FREEBSD_H_
+#define _FREEBSD_H_
+
+#define __FBSDID(X)
+
+#define __unused __attribute__((unused))
+
+#endif /* _FREEBSD_H_ */