diff --git a/flake.nix b/flake.nix
index fcc6165ed..3c49b8d0a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,7 +34,7 @@
           script = pkgs.writeShellApplication {
             name = "update-hash";
 
-            runtimeInputs = [ pkgs.nixFlakes pkgs.gawk ];
+            runtimeInputs = [pkgs.nixFlakes pkgs.gawk];
 
             text = ''
               nix --extra-experimental-features 'nix-command flakes' \
diff --git a/nix/lexical.nix b/nix/lexical.nix
index 4a3191125..1719f2a3c 100644
--- a/nix/lexical.nix
+++ b/nix/lexical.nix
@@ -3,6 +3,7 @@
   fetchMixDeps,
   elixir,
   writeScript,
+  fodHash ? (builtins.readFile ./hash),
 }:
 mixRelease rec {
   pname = "lexical";
@@ -16,7 +17,7 @@ mixRelease rec {
 
     src = ./..;
 
-    sha256 = builtins.readFile ./hash;
+    sha256 = fodHash;
   };
 
   installPhase = ''
@@ -29,7 +30,7 @@ mixRelease rec {
 
   preFixup = let
     activate_version_manager = writeScript "activate_version_manager.sh" ''
-    true
+      true
     '';
   in ''
     substituteInPlace "$out/bin/start_lexical.sh" --replace 'elixir_command=' 'elixir_command="${elixir}/bin/"'