diff --git a/Makefile b/Makefile
index aee7402..a9584be 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ install:
 
 image:
 	cd builder && sudo /usr/bin/packer build -var "pwn_hostname=$(PWN_HOSTNAME)" -var "pwn_version=$(PWN_VERSION)" pwnagotchi.json
-	sudo chown $USER:$USER builder/output-pwnagotchi/image
+	sudo chown $(USER):$(USER) builder/output-pwnagotchi/image
 	mv builder/output-pwnagotchi/image pwnagotchi-raspbian-lite-$(PWN_VERSION).img
 	sha256sum pwnagotchi-raspbian-lite-$(PWN_VERSION).img > pwnagotchi-raspbian-lite-$(PWN_VERSION).sha256
 	zip pwnagotchi-raspbian-lite-$(PWN_VERSION).zip pwnagotchi-raspbian-lite-$(PWN_VERSION).sha256 pwnagotchi-raspbian-lite-$(PWN_VERSION).img