diff --git a/hcl/gc.sh b/hcl/gc.sh
new file mode 100644
index 0000000..2396464
--- /dev/null
+++ b/hcl/gc.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euxo pipefail
+
+# prepare workspace just in case
+mkdir -p /nix/var/nix/gcroots/albatros
+cd /nix/var/nix/gcroots/albatros
+
+# remove any symlink that is older than 7 days
+NOW=$(date +%s)
+#EXPIRE=$((60*60*24*7)) # 7 days in seconds
+EXPIRE=1700 # 7 days in seconds
+
+for f in $(ls); do
+  CR=$(stat $f -c %W)
+  DIFF=$((NOW-CR))
+  if [[ $DIFF -gt $EXPIRE ]]; then 
+    echo "deleting $f"
+    rm -f $f
+  else 
+    echo "keeping $f"; 
+  fi
+done
+
+# we don't want to slow down the build too much, so
+# we limit to 1GB of deletion
+nix store gc --verbose --max 1G 
diff --git a/main.go b/main.go
index a881540..405c02f 100644
--- a/main.go
+++ b/main.go
@@ -404,7 +404,7 @@ func initConsul() {
 
 func main() {
 	var err error
-	// init components
+	// init components.
 	initConfig()
 	initNomad()
 	initConsul()