diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
index af7240e..57d515b 100644
--- a/templates/rust/flake.nix
+++ b/templates/rust/flake.nix
@@ -3,12 +3,12 @@
   inputs.git-hooks.url = "github:cachix/git-hooks.nix";
   inputs.git-hooks.inputs.nixpkgs.follows = "nixpkgs";
   outputs = inputs: let
-    inherit (import nix/boilerplate.nix inputs) fullImport genPkgs;
+    inherit (import nix/boilerplate.nix inputs) call genPkgs;
   in {
     # overlays = import nix/overlays.nix;
-    checks = fullImport nix/checks.nix;
-    packages = fullImport nix/packages.nix;
-    devShells = fullImport nix/shells.nix;
+    checks = call (import nix/checks.nix);
+    packages = call (import nix/packages.nix);
+    devShells = call (import nix/shells.nix);
     formatter = genPkgs (p: p.alejandra);
   };
 }
diff --git a/templates/rust/nix/boilerplate.nix b/templates/rust/nix/boilerplate.nix
index 2778326..e0b4acd 100644
--- a/templates/rust/nix/boilerplate.nix
+++ b/templates/rust/nix/boilerplate.nix
@@ -4,7 +4,7 @@ inputs @ {
   ...
 }: let
   forSelfOverlay =
-    if builtins.hasAttr "forSelf" self.overlays
+    if builtins.hasAttr "overlays" self && builtins.hasAttr "forSelf" self.overlays
     then self.overlays.forSelf
     else (_: p: p);
 in rec {