diff --git a/Makefile b/Makefile
index 8a475ea0..668b4fa4 100644
--- a/Makefile
+++ b/Makefile
@@ -46,16 +46,16 @@ packer: clean
 	sudo mv /tmp/packer /usr/bin/packer
 
 image: clean packer
-	export LC_ALL=en_GB.utf8
+	export LC_ALL=en_GB.UTF-8
 	cd builder && sudo /usr/bin/packer init combined.json.pkr.hcl && sudo $(UNSHARE) /usr/bin/packer build -var "pwn_hostname=$(PWN_HOSTNAME)" -var "pwn_version=$(PWN_VERSION)" combined.json.pkr.hcl
 
 bullseye: clean packer
-	export LC_ALL=en_GB.utf8
+	export LC_ALL=en_GB.UTF-8
 	cd builder && sudo /usr/bin/packer init data/32bit/raspberrypi32.json.pkr.hcl && sudo $(UNSHARE) /usr/bin/packer build -var "pwn_hostname=$(PWN_HOSTNAME)" -var "pwn_version=$(PWN_VERSION)" data/32bit/raspberrypi32.json.pkr.hcl
 	sudo pishrink -vaZ pwnagotchi-32bit.img
 
 bookworm: clean packer
-	export LC_ALL=en_GB.utf8
+	export LC_ALL=en_GB.UTF-8
 	cd builder && sudo /usr/bin/packer init data/64bit/raspberrypi64.json.pkr.hcl && sudo $(UNSHARE) /usr/bin/packer build -var "pwn_hostname=$(PWN_HOSTNAME)" -var "pwn_version=$(PWN_VERSION)" data/64bit/raspberrypi64.json.pkr.hcl
 	sudo pishrink -vaZ pwnagotchi-64bit.img