diff --git a/.github/workflow-templates/test-dapp.yml b/.github/workflow-templates/test-dapp.yml
index 006014c8d55..57dc881fb66 100644
--- a/.github/workflow-templates/test-dapp.yml
+++ b/.github/workflow-templates/test-dapp.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-card-store.yml b/.github/workflows/test-dapp-card-store.yml
index 9fa032fbb11..59b2abc35d5 100644
--- a/.github/workflows/test-dapp-card-store.yml
+++ b/.github/workflows/test-dapp-card-store.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-fungible-faucet.yml b/.github/workflows/test-dapp-fungible-faucet.yml
index afd7dc8d44d..8f481a89441 100644
--- a/.github/workflows/test-dapp-fungible-faucet.yml
+++ b/.github/workflows/test-dapp-fungible-faucet.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-oracle.yml b/.github/workflows/test-dapp-oracle.yml
index f5b5747541a..38adcf96059 100644
--- a/.github/workflows/test-dapp-oracle.yml
+++ b/.github/workflows/test-dapp-oracle.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-otc.yml b/.github/workflows/test-dapp-otc.yml
index 71301a0ff38..b8c3f9e8d03 100644
--- a/.github/workflows/test-dapp-otc.yml
+++ b/.github/workflows/test-dapp-otc.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-pegasus.yml b/.github/workflows/test-dapp-pegasus.yml
index 3930546a2a6..b700fd98c2a 100644
--- a/.github/workflows/test-dapp-pegasus.yml
+++ b/.github/workflows/test-dapp-pegasus.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-simple-exchange.yml b/.github/workflows/test-dapp-simple-exchange.yml
index 32c18266ae7..978ba4e2164 100644
--- a/.github/workflows/test-dapp-simple-exchange.yml
+++ b/.github/workflows/test-dapp-simple-exchange.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2
diff --git a/.github/workflows/test-dapp-treasury.yml b/.github/workflows/test-dapp-treasury.yml
index ad55d9be115..012d4d44727 100644
--- a/.github/workflows/test-dapp-treasury.yml
+++ b/.github/workflows/test-dapp-treasury.yml
@@ -19,15 +19,19 @@ jobs:
 
     - name: Checkout agoric-sdk
       uses: actions/checkout@v2
+      with:
+        path: agoric-sdk
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+        cache-dependency-path: agoric-sdk/yarn.lock
     - name: cache node modules
       uses: actions/cache@v1
       with:
         path: ~/.cache/yarn
-        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('agoric-sdk/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-
 
@@ -54,13 +58,16 @@ jobs:
 
     - name: yarn install --frozen-lockfile
       run: yarn install --frozen-lockfile
+      working-directory: ./agoric-sdk
     # 'yarn build' loops over all workspaces
     - name: yarn build
       run: yarn build
+      working-directory: ./agoric-sdk
     - name: yarn link
       run: |
         yarn link-cli ~/bin/agoric
         echo "/home/runner/bin" >> $GITHUB_PATH
+      working-directory: ./agoric-sdk
 
     - name: Check out dapp
       uses: actions/checkout@v2