docker: fix cl tag
diff --git a/.github/workflows/selfdrive_tests.yaml b/.github/workflows/selfdrive_tests.yaml
index 05400a0a507358..c6e68aa02e3e32 100644
--- a/.github/workflows/selfdrive_tests.yaml
+++ b/.github/workflows/selfdrive_tests.yaml
@@ -195,7 +195,7 @@ jobs:
     - name: Build and push CL Docker image
       if: matrix.arch == 'x86_64'
       run: |
-        echo "TARGET_ARCHITECTURE=''" >> "$GITHUB_ENV"
+        unset TARGET_ARCHITECTURE
         eval "$BUILD_CL"
 
   docker_push_multiarch:

<!-- Please copy and paste the relevant template -->

<!--- ***** Template: Car bug fix *****

**Description** [](A description of the bug and the fix. Also link any relevant issues.)

**Verification** [](Explain how you tested this bug fix.)

**Route**
Route: [a route with the bug fix]

-->

<!--- ***** Template: Bug fix *****

**Description** [](A description of the bug and the fix. Also link any relevant issues.)

**Verification** [](Explain how you tested this bug fix.)

-->

<!--- ***** Template: Car port *****

**Checklist**
- [ ] added entry to CarInfo in selfdrive/car/*/values.py and ran `selfdrive/car/docs.py` to generate new docs
- [ ] test route added to [routes.py](https://github.com/commaai/openpilot/blob/master/selfdrive/car/tests/routes.py)
- [ ] route with openpilot:
- [ ] route with stock system:

-->

<!--- ***** Template: Refactor *****

**Description** [](A description of the refactor, including the goals it accomplishes.)

**Verification** [](Explain how you tested the refactor for regressions.)

-->
