diff --git a/jupyterlab/main.tf b/jupyterlab/main.tf
index 25a9f3d..239c5aa 100644
--- a/jupyterlab/main.tf
+++ b/jupyterlab/main.tf
@@ -65,7 +65,7 @@ resource "coder_script" "jupyterlab" {
 
 resource "coder_app" "jupyterlab" {
   agent_id     = var.agent_id
-  slug         = "jupyterlab" # sync with with end of subdomain URL
+  slug         = "jupyterlab" # sync with the usage in URL
   display_name = "JupyterLab"
   url          = var.subdomain ? "http://localhost:${var.port}/@${data.coder_workspace_owner.me.name}/${data.coder_workspace.me.name}/apps/jupyterlab" : "http://localhost:${var.port}"
   icon         = "/icon/jupyter.svg"
diff --git a/jupyterlab/run.sh b/jupyterlab/run.sh
index db9ab51..1cae1db 100755
--- a/jupyterlab/run.sh
+++ b/jupyterlab/run.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-if [ -n "$BASE_URL" ]
+if [ -n "${BASE_URL}" ]
 then
     BASE_URL="--ServerApp.base_url=${BASE_URL}"
 fi
@@ -25,8 +25,8 @@ else
   printf "%s\n\n" "🥳 jupyterlab is already installed"
 fi
 
-echo "👷 Starting jupyterlab in background..."
-echo "check logs at ${LOG_PATH}"
+printf "👷 Starting jupyterlab in background..."
+printf "check logs at ${LOG_PATH}"
 $HOME/.local/bin/jupyter-lab --no-browser \
     "$BASE_URL" \
     --ServerApp.ip='*' \