diff --git a/docs/BUILD.md b/docs/BUILD.md
index 96470b0..fa7fda0 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -107,6 +107,12 @@ git clone https://github.com/drandyhaas/haasmesh.git
 
 ## Configure Build
 
+If you've done other builds, it is good to clean up first, maybe:
+
+```
+make clean
+```
+
 There are a variety of units the setup script is compatible with:
 
 * luma
@@ -136,6 +142,8 @@ git checkout b52b4afa15
 TODO: Add more versions, newer releases.
 
 
+
+
 To build, run the build script with one of these options.
 
 ```