Add a host for hydra.

nix/configuration/hosts/hydra/SELF_BUILD

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+: "${JOBS:="1"}"
+
+for f in /persist/manual/manual_add_to_store/*; do nix-store --add-fixed sha256 "$f"; done
+nixos-rebuild build --show-trace --sudo --max-jobs "$JOBS" --flake "$DIR/../../#hydra" --log-format internal-json -v "${@}" |& nom --json