diff --git a/README.md b/README.md
index 5d666fe..b73db17 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ Features Done so far:
 
 * Tailor made build system via powershell scripts
   * Supports building the repo with msvc or clang
+  * Will only build a module if it detects changes (md5 is cached)
   * Can stage codegen metaprograms to run before building the module
     * Will automatically not run if app process is found (for engine module).
   * Can emit exported mangled symbols for the engine module for hot-reload with the platform module without needing to use C linkage symbols or a complex hot-reload library (Live++, etc).
diff --git a/docs/Day 032.md b/docs/Day 032.md
index 8b803be..0226527 100644
--- a/docs/Day 032.md	
+++ b/docs/Day 032.md	
@@ -1,3 +1,5 @@
 # Day 32
 
+Vod was more of a pain to follow along than usual...
 
+I updated the scripts to only bild each module if it detects changes (just using md5 hash on the files).
diff --git a/scripts/rebuild.ps1 b/scripts/rebuild.ps1
index 8315f53..9cd66f8 100644
--- a/scripts/rebuild.ps1
+++ b/scripts/rebuild.ps1
@@ -2,4 +2,4 @@ $clean = join-path $PSScriptRoot 'clean.ps1'
 $build = join-path $PSScriptRoot 'build.ps1'
 
 & $clean
-& $build 'msvc' 'dev'
+& $build @args