install happy and alex with cabal on ubuntu too

Author: harisont

.github/workflows/build-binary-packages.yml

@@ -44,7 +44,8 @@ jobs:
           libghc-json-dev \
           default-jdk \
           python-dev-is-python3 \
-          libtool-bin
+          libtool-bin 
+        cabal install alex happy
     - name: Build package
       run: |
         make deb