diff --git a/Makefile b/Makefile
old mode 100644
new mode 100755
index e1ed6c1..e051386
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,11 @@
 ERL=erl
-OTP_TOP=/opt/local/lib/erlang/lib
-PLT_SRC=$(OTP_TOP)/kernel-2.12.4/ebin $(OTP_TOP)/stdlib-1.15.4/ebin/ $(OTP_TOP)/crypto-1.5.2.1/ebin $(OTP_TOP)/compiler-4.5.4/ebin $(OTP_TOP)/hipe-3.6.8/ebin/ $(OTP_TOP)/syntax_tools-1.5.5/ebin $(OTP_TOP)/hipe-3.6.8/ebin ebin
+OTP_TOP=/usr/lib/erlang/lib
+PLT_SRC=$(OTP_TOP)/kernel-2.12.5/ebin $(OTP_TOP)/stdlib-1.15.5/ebin/ $(OTP_TOP)/crypto-1.5.3/ebin $(OTP_TOP)/compiler-4.5.5/ebin $(OTP_TOP)/hipe-3.6.9/ebin/ $(OTP_TOP)/syntax_tools-1.5.6/ebin $(OTP_TOP)/hipe-3.6.9/ebin ebin
 
 all: compile docs
 
 compile:
+	test -d ebin || mkdir ebin
 	$(ERL) -make
 	cd priv && make
 
@@ -14,7 +15,7 @@ static:
 clean:
 	- rm -rf ebin/*.beam doc/* sqlite3.plt src/test/*.beam
 	- rm -rf ct_run* all_runs.html variables* index.html
-	find . -name "*~" | xargs rm
+	- find . -name "*~" | xargs rm
 	cd priv && make clean
 
 docs: