diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index c2b83ff..2e0b4ac 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -20,6 +20,7 @@ jobs:
           # if there's no cache hit, restore a cache by this prefix
           restore-prefixes-first-match: nix-${{ runner.os }}-
           purge: true
+          gc-max-store-size: 5G
           purge-prefixes: nix-${{ runner.os }}-
           purge-created: 60000
           purge-primary-key: never