diff --git a/flake.nix b/flake.nix
index 7818526..6242681 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,13 +15,13 @@
         tlaternet-templates = rec {
           packages = rec {
             nodeEnv = prev.callPackage ./nix/override.nix { };
-            templates = prev.callPackage ({ stdenv, nodejs, file-rename, ... }:
+            templates = prev.callPackage ({ stdenv, nodejs, rename, ... }:
               let nodeDeps = nodeEnv.shell.nodeDependencies;
               in stdenv.mkDerivation {
                 name = "tlaternet-templates";
                 src = ./.;
 
-                buildInputs = [ nodejs file-rename ];
+                buildInputs = [ nodejs rename ];
                 buildPhase = ''
                   ln -s ${nodeDeps}/lib/node_modules ./node_modules
                   export PATH="${nodeDeps}/bin:$PATH"
@@ -34,7 +34,7 @@
                 '';
 
                 postFixup = ''
-                  rename '.html' '.html.hbs' $out/browser/*.html
+                  rename 's/.html$/.html.hbs/' $out/browser/*.html
                 '';
               }) { };
           };