diff --git a/nix/prefetcher.nix b/nix/prefetcher.nix
index 3f8fb2d..5362219 100644
--- a/nix/prefetcher.nix
+++ b/nix/prefetcher.nix
@@ -3,7 +3,13 @@
   pkgs ? import <nixpkgs> {},
 }:
 pkgs.callPackage (import ./.) {
-  buildGoModule = pkgs.buildGo118Module;
+  ## Keeping `buildGoModule` commented out in case it's needed in the future.
+  ## As of writing, `buildGo121Module` is currently used as the default for
+  ## `buildGoModule` in nixpkgs. `buildGo118Module` seems deprecated and
+  ## entirely removed from nixpkgs, so manually setting that is likely to cause
+  ## issues in the future.
+
+  # buildGoModule = pkgs.buildGo118Module;
   vendorSha256 = sha256;
 }
 // {
diff --git a/nix/vendor-sha256 b/nix/vendor-sha256
index e69de29..b59ccb9 100644
--- a/nix/vendor-sha256
+++ b/nix/vendor-sha256
@@ -0,0 +1 @@
+sha256-yL5pWbVqf6mEpgYsItLnv8nwSmoMP+SE0rX/s7u2vCg=