Use custom build image

.woodpecker/deploy.yaml

@@ -8,8 +8,7 @@ variables: &nix-config
 
 steps:
   - name: Check Flake
-    image: nixos/nix:latest
-    pull: true
+    image: nixlocal
     entrypoint: ["/bin/sh", "-c"]
     commands:
       - nix-channel --add https://nixos.org/channels/nixos-$${NIXOS_VERSION} nixos
@@ -21,8 +20,7 @@ steps:
       - evaluate: 'CI_PIPELINE_EVENT != "cron" && CI_PIPELINE_EVENT != "schedule"'
 
   - name: Deploy
-    image: nixos/nix:latest
-    pull: true
+    image: nixlocal
     commands:
       - nix-env -iA nixos.openssh
       - eval "$(ssh-agent -s)"