diff --git a/.npmignore b/.npmignore
index 89433f5d7a..06c2e230b4 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,3 +1,7 @@
+# Temporary until Blockly v12 release
+/blockly-rc/
+/temp-use-blockly-v12-rc.sh
+
 # Development files
 /.circleci
 .eslintrc