diff --git a/Makefile b/Makefile
index 3f55905..cd81fc9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,9 @@
+previous_tags=$(shell cat .roles_played | tr '\n' ',')
+
 %:
 	ansible-playbook playbook.yml --ask-become-pass -t $@ --vault-password-file=get-vault-password.sh
 	@echo $@ | grep -v all >> .roles_played
 	@cat .roles_played | sort | uniq > temp && mv temp .roles_played
 
 previous:
-	ansible-playbook playbook.yml --ask-become-pass -t ${previous_tags} --vault-password-file=get-vault-password.sh
+	ansible-playbook playbook.yml --ask-become-pass -t '${previous_tags}' --vault-password-file=get-vault-password.sh