diff --git a/nixos/modules/services/web-apps/mastodon.nix b/nixos/modules/services/web-apps/mastodon.nix
index 47da8b9867a..92b1be963bf 100644
--- a/nixos/modules/services/web-apps/mastodon.nix
+++ b/nixos/modules/services/web-apps/mastodon.nix
@@ -367,6 +367,7 @@ in {
       '' else "") + ''
         EOF
       '';
+      environment = env;
       serviceConfig = {
         Type = "oneshot";
         User = cfg.user;