diff --git a/README.md b/README.md
index 769ef65..f1a4cab 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,10 @@ Build
     cd static
     pip3 install cffi
     python3 build_linux.py
+    
+To build a complete set of libs for Python 3.6, 3.7, 3.8 and 3.9:
+
+    ./build_linux_multi.sh
 
 # Use
 
@@ -140,5 +144,4 @@ See test_dynamic.py for how to use.
  * converting more examples from C to python
  * testing and building on more platforms
  * sorting out binary wheel distribution for Mac/Win and compile-from-source distributtion for Linux
- * dealing with conversions to pointers in PyRay automatically