diff --git a/flake.nix b/flake.nix
index c62cea7..d916cbf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -68,7 +68,10 @@
         # ])
       ] ++ import ./overlay;
 
-      pkgsFor = flake-utils.lib.eachDefaultSystem (
+      eachDefaultSystemPassThrough = flake-utils.lib.eachDefaultSystemPassThrough;
+      eachDefaultSystem = flake-utils.lib.eachDefaultSystem;
+
+      pkgsFor = eachDefaultSystem (
         system:
         import nixpkgs {
           inherit system overlays;
@@ -78,7 +81,7 @@
         }
       );
 
-      treefmtEval = flake-utils.lib.eachDefaultSystem (
+      treefmtEval = eachDefaultSystemPassThrough (
         system:
         treefmt.lib.evalModule pkgsFor.system {
           projectRootFile = "flake.nix";
@@ -94,8 +97,8 @@
       );
     in
     {
-      formatter = flake-utils.lib.eachDefaultSystem (system: treefmtEval.${system}.config.build.wrapper);
-      checks = flake-utils.lib.eachDefaultSystem (system: {
+      formatter = eachDefaultSystemPassThrough (system: treefmtEval.${system}.config.build.wrapper);
+      checks = eachDefaultSystem (system: {
         formatting = treefmtEval.${system}.config.build.check self;
       });
       # lets us build overlaid packages with `nix build .#<package>`