diff --git a/flake.nix b/flake.nix
index 0bf0dd30e..6bed82d56 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,8 +27,8 @@
           # Directories that are neither needed for building the frontend nor the backend.
           # For better build caching.
           unrelatedDirs = [
-                "flake.lock"
-                (filter.matchExt "nix")
+            "flake.lock"
+            (filter.matchExt "nix")
             "docs"
             "docker"
             "docker-compose.test.yml"