diff --git a/docs/BUILD.md b/docs/BUILD.md
index e2e16e8..fcac769 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -75,6 +75,21 @@ apt install								\
 	sharutils
 ```
 
+Maybe want to use `ccache` to save on rebuilds:
+
+```
+apt install ccache
+```
+
+Add to your `~/.bashrc`:
+
+```
+PATH=/usr/lib/ccache:$PATH
+```
+
+Then log out and back in and run `echo $PATH` to make sure it is there.
+Run `ccache -s` during build to see cache hit rate.
+
 ## Get Source
 
 Clone OpenWRT sources, around ~300 megs: