diff --git a/.tangled/workflows/ci.yml b/.tangled/workflows/ci.yml
index 291a665..e8a9524 100644
--- a/.tangled/workflows/ci.yml
+++ b/.tangled/workflows/ci.yml
@@ -7,8 +7,9 @@ clone:
   depth: 1
   submodules: false
 dependencies:
-  - ruby
-  - postgresql
+  nixpkgs:
+    - ruby
+    - postgresql
 environment:
   MUTANT_SINCE: 'HEAD^'
 steps: