diff --git a/roles/cobald/tasks/dev.yml b/roles/cobald/tasks/dev.yml
index 9fef723..099f135 100644
--- a/roles/cobald/tasks/dev.yml
+++ b/roles/cobald/tasks/dev.yml
@@ -18,6 +18,11 @@
   become_user: "{{unpriv_user}}"
   register: tardis_git_pull
 
+- name: "get unpriv_user {{unpriv_user}} uid and gid"
+  getent:
+    database: passwd
+    key: "{{unpriv_user}}"
+
 - name: run pip install
   docker_container:
     image: cobald
@@ -27,7 +32,7 @@
     state: started
     detach: False
     cleanup: True
-    user: 1000:1000 # FIXME
+    user: "{{getent_passwd[unpriv_user][1]}}:{{getent_passwd[unpriv_user][2]}}"
     entrypoint: ""
     command: |
       bash -c 'HOME=/tmp pip3 install --editable /usr/local/src/{{item.name}}'