diff --git a/nix/sources.json b/nix/sources.json
index 53ced7dcec1..c16f6cf51f8 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -41,10 +41,10 @@
         "homepage": null,
         "owner": "input-output-hk",
         "repo": "iohk-nix",
-        "rev": "8e469d915634f3bff21cb6fd6b7ee381bcffe1a0",
-        "sha256": "0xb5j2yqw8q32pb9b146333rbfyzsdb9dllda72i98cqmb2ma02a",
+        "rev": "f2bd96e5534826ed619a9c9f9130263ff5ecef1e",
+        "sha256": "0yibiv8vh3h2zw35ala0yksxcjj4rs08las80qn4lrakxn4ikxqi",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/iohk-nix/archive/8e469d915634f3bff21cb6fd6b7ee381bcffe1a0.tar.gz",
+        "url": "https://github.com/input-output-hk/iohk-nix/archive/f2bd96e5534826ed619a9c9f9130263ff5ecef1e.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }
diff --git a/nix/supervisord-cluster/default.nix b/nix/supervisord-cluster/default.nix
index 11ade562ea5..e18bb636c3b 100644
--- a/nix/supervisord-cluster/default.nix
+++ b/nix/supervisord-cluster/default.nix
@@ -8,6 +8,7 @@
 , basePort ? 30000
 , stateDir ? "./state-cluster"
 , initialFunds ? import ./initial-funds.nix
+, ...
 }:
 let
   baseEnvConfig = pkgs.callPackage ./base-env.nix { inherit (pkgs.commonLib.cardanoLib) defaultLogConfig; inherit stateDir; };