diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6b3f468..8c079c2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,7 +31,8 @@ jobs:
           distribution: 'full'
           version: '8.6'
       - name: Install deps
-        run:  raco pkg install --auto --batch --fail-fast rackcheck; raco pkg install --auto --batch --fail-fast cover;  #  Runs a single command using the runners shell
+        run:  sudo raco pkg install --auto --batch --fail-fast rackcheck pegwfgen typed-racket-datatype
+              sudo raco pkg install --auto --batch --fail-fast cover;  #  Runs a single command using the runners shell
       
       - name: compile
         run: sudo raco setup; sudo raco pkg install; raco make main.rkt