updating command

playbooks/roles/edxapp/tasks/deploy.yml

@@ -109,8 +109,8 @@
 # Substitute github mirror in all requirements files
 #
 - name: Updating requirement files for git mirror
-  shell: >
-    "sed -i -e 's/github\.com/{{ GIT_MIRROR }}/g' {{ item }}"
+  command: |
+    /bin/sed -i -e 's/github\.com/{{ GIT_MIRROR }}/g' {{ item }}
   with_items:
     - "{{ pre_requirements_file }}"
     - "{{ post_requirements_file }}"