diff --git a/templates/flake-parts/flake.nix b/templates/flake-parts/flake.nix
index f9d1e7a46..1aea74d5c 100644
--- a/templates/flake-parts/flake.nix
+++ b/templates/flake-parts/flake.nix
@@ -2,7 +2,7 @@
   description = "Description for the project";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:github:cachix/devenv-nixpkgs/rolling";
     devenv.url = "github:cachix/devenv";
     nix2container.url = "github:nlewo/nix2container";
     nix2container.inputs.nixpkgs.follows = "nixpkgs";
@@ -26,6 +26,9 @@
         # module parameters provide easy access to attributes of the same
         # system.
 
+        # needed for devenv up
+        packages.devenv-up = self'.devShells.default.config.procfileScript;
+
         # Equivalent to  inputs'.nixpkgs.legacyPackages.hello;
         packages.default = pkgs.hello;
 
diff --git a/templates/simple/flake.nix b/templates/simple/flake.nix
index a440343d2..b049d27f1 100644
--- a/templates/simple/flake.nix
+++ b/templates/simple/flake.nix
@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+    nixpkgs.url = "github:github:cachix/devenv-nixpkgs/rolling";
     systems.url = "github:nix-systems/default";
     devenv.url = "github:cachix/devenv";
   };