diff --git a/build.ipynb b/build.ipynb
index 92ce887..58cbbd2 100644
--- a/build.ipynb
+++ b/build.ipynb
@@ -352,25 +352,57 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "d4139bf6",
-   "metadata": {},
+   "metadata": {
+    "vscode": {
+     "languageId": "shellscript"
+    }
+   },
    "outputs": [],
    "source": [
-    "!echo \"kubectl create secret docker-registry regcred --docker-server=$REGISTRY_HOST --docker-username='user' --docker-password=$REGISTRY_PASS --docker-email=\\\"$(git config --global --get user.email)\\\" && clear && history -c\""
+    "!echo \"kubectl create secret docker-registry regcred --docker-server=$REGISTRY_HOST --docker-username='user' --docker-password=$REGISTRY_PASS --docker-email=\\\"$(git config --global --get user.email)\\\" && clear && history -c && history -w\""
    ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "fa824c3b",
-   "metadata": {},
+   "id": "5aed91fa",
+   "metadata": {
+    "vscode": {
+     "languageId": "shellscript"
+    }
+   },
    "outputs": [],
    "source": [
-    "!echo \"kubectl apply -f - <<'EOF'\"\n",
-    "!echo \"$(envsubst < k8s/tg.yaml)\"\n",
-    "!echo \"EOF\"\n",
-    "!echo \"clear\"\n",
-    "!echo \"history -c\"\n",
-    "!echo \"\""
+    "%%bash\n",
+    "set -euo pipefail\n",
+    "EXPANDED=\"$(envsubst < k8s/tg.yaml)\"\n",
+    "echo \"$EXPANDED\"\n",
+    "echo \"kubectl apply -f - <<'EOF'\"\n",
+    "echo \"$(envsubst < k8s/tg.yaml)\"\n",
+    "echo \"EOF\"\n",
+    "echo \"clear\"\n",
+    "echo \"history -c\"\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2a13a8af",
+   "metadata": {
+    "vscode": {
+     "languageId": "shellscript"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "%%bash\n",
+    "echo \"kubectl apply -f - <<'EOF'\"\n",
+    "envsubst < k8s/tg.yaml\n",
+    "echo\n",
+    "echo \"EOF\"\n",
+    "echo \"clear\"\n",
+    "echo \"history -c\"\n",
+    "echo \"history -w\"\n"
    ]
   },
   {