diff --git a/.woodpecker.yaml b/.woodpecker.yaml
index 5697c89..bc90676 100644
--- a/.woodpecker.yaml
+++ b/.woodpecker.yaml
@@ -48,6 +48,11 @@ steps:
       - echo "Building angie $VERSION"
       - STREAM="$(nix build .#default --print-out-paths --no-link)"
 
+      # skopeo writes intermediate files under /var/tmp by default; the
+      # nix-ci image doesn't seed that path, so point it at $HOME/tmp.
+      - mkdir -p "$HOME/tmp"
+      - export TMPDIR="$HOME/tmp"
+
       # Auth + push to Gitea OCI registry under both <ver>-arm64 and latest-arm64.
       - mkdir -p ~/.config/containers
       - |