diff --git a/.forgejo/workflows/build-image.yaml b/.forgejo/workflows/build-image.yaml
index f69b695..74fb4b2 100644
--- a/.forgejo/workflows/build-image.yaml
+++ b/.forgejo/workflows/build-image.yaml
@@ -1,6 +1,8 @@
 on:
   push:
 
+env:
+  RUNNER_OS: 'Linux'
 
 jobs:
   oci-builder: