diff --git a/Makefile b/Makefile
index b61a1b4..f87ad8c 100644
--- a/Makefile
+++ b/Makefile
@@ -76,4 +76,4 @@ clean:
 	- rm -f $(PACKER)
 	- rm -f $(PWN_RELEASE).*
 	- sudo rm -rf builder/output-pwnagotchi builder/packer_cache
-
+	- sudo rm -rf /root/.cache/packer
diff --git a/builder/pwnagotchi.json b/builder/pwnagotchi.json
index ce54305..8f1f33e 100644
--- a/builder/pwnagotchi.json
+++ b/builder/pwnagotchi.json
@@ -31,6 +31,7 @@
       "inline": [
         "apt-get -y --allow-releaseinfo-change update",
         "apt-get install -y --no-install-recommends ansible"
+        "export MAKEFLAGS=-j$(nproc-1)"
       ]
     },
     {