diff --git a/roles/install_node_exporter/tasks/main.yaml b/roles/install_node_exporter/tasks/main.yaml
index c7a13887..a199fcbb 100644
--- a/roles/install_node_exporter/tasks/main.yaml
+++ b/roles/install_node_exporter/tasks/main.yaml
@@ -5,7 +5,7 @@
     dest: "/tmp/{{ sha256 }}"
 
 - set_fact:
-    md5_value: "{{ lookup('file', '/tmp/{{ sha256 }}') }}"
+    md5_value: "{{ lookup('{{ file }}', '/tmp/{{ sha256 }}') }}"
 
 - name: Download node_exporter binary
   get_url:
@@ -48,4 +48,4 @@
   systemd:
     name: node_exporter
     state: restarted
-    enabled: true
\ No newline at end of file
+    enabled: true