diff --git a/tasks/docker-registry/task.yaml b/tasks/docker-registry/task.yaml
index d4aefc0..350d841 100644
--- a/tasks/docker-registry/task.yaml
+++ b/tasks/docker-registry/task.yaml
@@ -80,25 +80,20 @@ spec:
       env:
         - name: DOCKER_CONFIG
           value: /tekton/home/.docker
-        - name: PYPI_USERNAME
-          valueFrom:
-            secretKeyRef:
-              name: pypi-auth
-              key: username
-        - name: PYPI_PASSWORD
-          valueFrom:
-            secretKeyRef:
-              name: pypi-auth
-              key: password
-      command:
-        - /kaniko/executor
-      args:
-        - --dockerfile=$(params.subdirectory)/$(params.dockerfile)
-        - --context=$(params.subdirectory)/$(params.context)
-        - --destination=$(params.imageName):$(params.tag)
-        - --skip-tls-verify
-        - --reproducible
-        - --verbosity=info
-        - --build-arg=PYPI_USERNAME=$(PYPI_USERNAME)
-        - --build-arg=PYPI_PASSWORD=$(PYPI_PASSWORD)
+      script: |
+        #!/bin/sh
+        set -e
+
+        PYPI_USERNAME=$(cat /workspace/pypi-auth/username)
+        PYPI_PASSWORD=$(cat /workspace/pypi-auth/password)
+
+        /kaniko/executor \
+          --dockerfile=$(params.subdirectory)/$(params.dockerfile) \
+          --context=$(params.subdirectory)/$(params.context) \
+          --destination=$(params.imageName):$(params.tag) \
+          --skip-tls-verify \
+          --reproducible \
+          --verbosity=info \
+          --build-arg PYPI_USERNAME=$PYPI_USERNAME \
+          --build-arg PYPI_PASSWORD=$PYPI_PASSWORD