diff --git a/flake.nix b/flake.nix
index e22e08f7a..808b48d93 100644
--- a/flake.nix
+++ b/flake.nix
@@ -162,7 +162,11 @@
                     text = ''
                       cat ${mobilizonConfig} > config/runtime.exs
                       # We assume the database already exists
-                      sudo -u postgres psql -d mobilizon -c "create extension if not exists postgis; create extension if not exists unaccent; create extension if not exists pg_trgm;"
+                      sudo -u postgres psql -d mobilizon << SQL
+                        create extension if not exists postgis;
+                        create extension if not exists unaccent;
+                        create extension if not exists pg_trgm;
+                      SQL
                       mix ecto.migrate
                     '';
                   })