diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 33fdf23c..a41a9f43 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,7 @@ on: [push, pull_request]
 
 env: 
   KALEIDOSCOPE_ETC_DIR: $(GITHUB_WORKSPACE)/etc
+  KALEIDOSCOPE_BUILDER_DIR: $(GITHUB_WORKSPACE)/bin
   ARDUINO_DIRECTORIES_USER: $(GITHUB_WORKSPACE)/.arduino/user
   BOARD_HARDWARE_PATH: $(ARDUINO_DIRECTORIES_USER)/hardware
 jobs: