Fix shell not being included for build action

.github/actions/build/action.yml

@@ -13,6 +13,10 @@ inputs:
         required: true
         default: .
 
+env:
+    BUILD_FOLDER: ${{ inputs.folder }}
+    BASE: ${{ inputs.base }}
+
 runs:
     using: composite
     steps:
@@ -22,13 +26,12 @@ runs:
               node-version: 15
               cache: "yarn"
 
-        - run: yarn install
-        # - run: yarn check
+        - name: install dependencies
+          shell: bash -l {0}
+          run: yarn install
 
         - name: build
-          env:
-              BUILD_FOLDER: ${{ inputs.folder }}
-              BASE: ${{ inputs.base }}
+          shell: bash -l {0}
           run: |
               cd "$BUILD_FOLDER"
               yarn build --base "$BASE"