diff --git a/env.yml b/env.yml
index 8091f23..099c080 100644
--- a/env.yml
+++ b/env.yml
@@ -3,6 +3,7 @@ timezone: "Europe/Paris"
 host_uid: 1000
 docker_projects_dir: "{{ ansible_env['HOME'] }}/docker-projects"
 project_dir: "{{ docker_projects_dir }}/{{ role_name }}"
+docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
 
 # UID shift for mapping between host & containers
 uid_shift: 99999
diff --git a/roles/dockerd/tasks/main.yml b/roles/dockerd/tasks/main.yml
index 7134a86..5628d96 100644
--- a/roles/dockerd/tasks/main.yml
+++ b/roles/dockerd/tasks/main.yml
@@ -40,7 +40,7 @@
   lineinfile:
     path: "{{ ansible_env['HOME'] }}/.profile"
     regex: '^export DOCKER_HOST='
-    line: "export DOCKER_HOST=unix:///run/user/{{ host_uid }}/docker.sock"
+    line: "export DOCKER_HOST={{ docker_host }}"
 
 - name: "Make sure lingering is enabled for user {{ host_uid }}"
   command:
diff --git a/roles/hedgedoc/tasks/backup.yml b/roles/hedgedoc/tasks/backup.yml
index 5e1ca62..fed2a18 100644
--- a/roles/hedgedoc/tasks/backup.yml
+++ b/roles/hedgedoc/tasks/backup.yml
@@ -1,7 +1,7 @@
 - name: Backup MySQL database
   community.docker.docker_container_exec:
     container: hedgedoc-mysql
-    docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
+    docker_host: "{{ docker_host }}"
     argv:
       - /bin/bash
       - "-c"
diff --git a/roles/postgres/tasks/backup.yml b/roles/postgres/tasks/backup.yml
index e9bfef1..cd90c01 100644
--- a/roles/postgres/tasks/backup.yml
+++ b/roles/postgres/tasks/backup.yml
@@ -8,7 +8,7 @@
     -
     --stdin-name dumpall.sql
   environment:
-    DOCKER_HOST: "unix:///run/user/{{ host_uid }}/docker.sock"
+    DOCKER_HOST: "{{ docker_host }}"
     BORG_PASSCOMMAND: "cat {{ borg_passphrase_file }}"
   become: true
 
diff --git a/roles/synapse/tasks/backup.yml b/roles/synapse/tasks/backup.yml
index f4d02fc..dc38e8e 100644
--- a/roles/synapse/tasks/backup.yml
+++ b/roles/synapse/tasks/backup.yml
@@ -1,7 +1,7 @@
 - name: Backup PostgreSQL database
   community.docker.docker_container_exec:
     container: synapse-postgres
-    docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
+    docker_host: "{{ docker_host }}"
     command: |
       pg_dump -c
       -d synapse