diff --git a/playbooks/install-storage.yml b/playbooks/install-storage.yml
index 23289d0..21254f9 100644
--- a/playbooks/install-storage.yml
+++ b/playbooks/install-storage.yml
@@ -1,51 +1,53 @@
 - hosts: cassandra-clients
   tasks:
   - name: "set rpc server source location"
     set_fact:
       storage_source: "/home/{{ansible_user}}/swh-storage"
 
   - name: "get swh-storage-cassandra's source"
     git:
       dest: "{{storage_source}}"
       repo: "https://forge.softwareheritage.org/source/swh-storage-cassandra.git"
       version: "cassandra-backend2"
       remote: "origin-cassandra"
       force: yes
 
   - name: "write dummy version file"
     # to please vcversioner
     copy:
       content: "0.0.999999--"
       dest: "{{storage_source}}/version.txt"
 
   - name: "install swh-storage-cassandra"
     shell: "python3 setup.py develop --user"
     args:
       chdir: "{{storage_source}}"
+    environment:
+      CASS_DRIVER_BUILD_CONCURRENCY: 8
 
   - name: "copy rpc server config file"
     template:
       src: "storage_cassandra.yml"
       dest: "/home/{{ansible_user}}/storage_cassandra.yml"
 
   - name: "create systemd unit dir"
     file:
       path: "/home/{{ansible_user}}/.config/systemd/user/"
       state: directory
   - name: "install swh-storage-cassandra systemd unit"
     template:
       src: "swh-storage-cassandra@.service"
       dest: "/home/{{ansible_user}}/.config/systemd/user/swh-storage-cassandra@.service"
   - name: "enable systemd unit"
     systemd:
       name: "swh-storage-cassandra@{{item}}.service"
       enabled: yes
       user: yes
       daemon_reload: yes # https://github.com/ansible/ansible/issues/36585
     with_items: "{{swh_storage_ports}}"
   - name: "start swh-storage-cassandra"
     systemd:
       name: "swh-storage-cassandra@{{item}}.service"
       state: restarted
       user: yes
     with_items: "{{swh_storage_ports}}"