diff --git a/build/docs-core.sh b/build/docs-core.sh
index 25923bde..e4425396 100755
--- a/build/docs-core.sh
+++ b/build/docs-core.sh
@@ -5,8 +5,11 @@ REPO=./.tmp/repos/rockets
 # clone
 git clone --depth=1 https://github.com/conceptadev/rockets.git $REPO
 
-# install and build
-yarn --cwd $REPO
+# install
+yarn --cwd $REPO --immutable
+
+# build
+yarn --cwd $REPO build
 
 # typedoc
 typedoc --options typedoc.rockets.json
\ No newline at end of file
diff --git a/build/docs-react.sh b/build/docs-react.sh
index e14509e0..0eb2a632 100755
--- a/build/docs-react.sh
+++ b/build/docs-react.sh
@@ -5,8 +5,11 @@ REPO=./.tmp/repos/rockets-react
 # clone
 git clone --depth=1 https://github.com/conceptadev/rockets-react.git $REPO
 
-# install and build
-yarn --cwd $REPO
+# install
+yarn --cwd $REPO --immutable
+
+# build
+yarn --cwd $REPO build
 
 # typedoc
 typedoc --options typedoc.rockets-react.json
\ No newline at end of file