explicitly warn not to use yosys tarball

diff --git a/HDL_workflow.mdwn b/HDL_workflow.mdwn
index 0677ef900250b4cde1c0c46b338395eeb9aceb02..8a7be62c9080765399aa4f459dfab2c73d9d6744 100644 (file)
--- a/HDL_workflow.mdwn
+++ b/HDL_workflow.mdwn
@@ -325,7 +325,8 @@ and that people communicate and coordinate with each other.
 
 ## yosys
 
-Follow the source code (git clone) instructions here:
+Follow the source code (git clone) instructions here, do **not** use
+the "stable" version (do not download the tarball):
 <http://www.clifford.at/yosys/download.html>
 
 Or, alternatively, use the