diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..3cbf420
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,34 @@
+MIT/X Consortium License
+
+© 2014-2022 Hiltjo Posthuma <hiltjo at codemadness dot org>
+© 2018 Devin J. Pohly <djpohly at gmail dot com>
+© 2014-2017 Quentin Rameau <quinq at fifth dot space>
+© 2009-2012 Aurélien APTEL <aurelien dot aptel at gmail dot com>
+© 2008-2017 Anselm R Garbe <garbeam at gmail dot com>
+© 2012-2017 Roberto E. Vargas Caballero <k0ga at shike2 dot com>
+© 2012-2016 Christoph Lohmann <20h at r-36 dot net>
+© 2013 Eon S. Jeon <esjeon at hyunmu dot am>
+© 2013 Alexander Sedov <alex0player at gmail dot com>
+© 2013 Mark Edgar <medgar123 at gmail dot com>
+© 2013-2014 Eric Pruitt <eric.pruitt at gmail dot com>
+© 2013 Michael Forney <mforney at mforney dot org>
+© 2013-2014 Markus Teich <markus dot teich at stusta dot mhn dot de>
+© 2014-2015 Laslo Hunhold <dev at frign dot de>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/Makefile b/Makefile
index b99abc8..c516c58 100644
--- a/Makefile
+++ b/Makefile
@@ -11,19 +11,19 @@ OBJ = $(SRC:.c=.o)
 
 all: st terminfo
 
-*.c: buildroot
-*.h: buildroot
 .c.o:
 	$(CC) $(STCFLAGS) -c $<
 
-st.o: buildroot config.h st.h win.h
-x.o: buildroot arg.h config.h st.h win.h $(LIGATURES_H)
+st.o: config.h st.h win.h
+x.o: arg.h config.h st.h win.h $(LIGATURES_H)
 config.mk:
 	cp config/config.mk config.mk
 config.h:
 	cp config/config.h config.h
 
-$(OBJ): config.h config.mk buildroot
+$(SRC): buildroot
+
+$(OBJ): config.h config.mk
 
 st: buildroot $(OBJ)
 	$(CC) -o $@ $(OBJ) $(STLDFLAGS)
@@ -40,7 +40,7 @@ clean:
 buildroot:
 	cp config/patches.h st-flexipatch/patches.h
 	flexipatch-finalizer/flexipatch-finalizer.sh -r -d st-flexipatch -o tmp
-	rm -r tmp/Makefile
+	rm -r tmp/Makefile tmp/config.mk patch 2>/dev/null || true
 	mv tmp/* ./
 	for patch in config/patches/*.diff; do patch <"$$patch"; done