diff --git a/project/workflow/rules/kraken.smk b/project/workflow/rules/kraken.smk
index d6bb7acefc882fe8376b46d6f5fb9e4458f3c22d..3d5310a98590a8dccb2a264c6f37baf1818fb922 100644
--- a/project/workflow/rules/kraken.smk
+++ b/project/workflow/rules/kraken.smk
@@ -7,7 +7,7 @@ rule build:
     conda:
         "../envs/yourenv.yaml"
     shell:
-        "kraken2-build --standard --threads {threads} --db {output}" 
+        "kraken2-build --standard --threads {threads} --db db" 
 
 rule report:
     input: