diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
index db41d93..17a39cb 100644
--- a/.gitea/workflows/check.yml
+++ b/.gitea/workflows/check.yml
@@ -37,6 +37,8 @@ jobs:
     timeout-minutes: 60
     env:
       NIX_CONFIG: |
+        max-jobs = 1
+        cores = 1
         experimental-features = nix-command flakes
         sandbox = false
       NIX_SSL_CERT_FILE: /etc/ssl/certs/ca-certificates.crt