diff --git a/inputs.nix b/inputs.nix
index 78f008c..1c6c039 100644
--- a/inputs.nix
+++ b/inputs.nix
@@ -10,16 +10,14 @@ let self = {
     url = "https://github.com/nix-community/nixos-vscode-server/archive/${lock.nixos-vscode-server.revision}.tar.gz";
     updateScript = pkgs.den-http-get-updater {
       fileLocation = lockFile;
+      previousHash = lock.nixos-vscode-server.sha256;
       previousVersion = lock.nixos-vscode-server.revision;
       versionUrl = "https://api.github.com/repos/nix-community/nixos-vscode-server/commits";
       contentParser = "jq -rc '.[0].sha' <<< \"$newVersion\"";
-      prefetchList = [{
-        previousHash = lock.nixos-vscode-server.sha256;
-        prefetchUrlLocation = {
-          file = ./inputs.nix;
-          attrpath = "nixos-vscode-server.url";
-        };
-      }];
+      prefetchUrlLocation = {
+        file = ./inputs.nix;
+        attrpath = "nixos-vscode-server.url";
+      };
     };
     outPath = builtins.fetchTarball {
       inherit url;
@@ -31,15 +29,13 @@ let self = {
     url = "https://github.com/NixOS/nixpkgs/archive/${lock.nixpkgs.revision}.tar.gz";
     updateScript = pkgs.den-http-get-updater {
       fileLocation = lockFile;
+      previousHash = lock.nixpkgs.sha256;
       previousVersion = lock.nixpkgs.revision;
       versionUrl = "https://channels.nixos.org/nixos-24.11/git-revision";
-      prefetchList = [{
-        previousHash = lock.nixpkgs.sha256;
-        prefetchUrlLocation = {
-          file = ./inputs.nix;
-          attrpath = "nixpkgs.url";
-        };
-      }];
+      prefetchUrlLocation = {
+        file = ./inputs.nix;
+        attrpath = "nixpkgs.url";
+      };
     };
     outPath = builtins.fetchTarball {
       inherit url;
@@ -51,15 +47,13 @@ let self = {
     url = "https://github.com/NixOS/nixpkgs/archive/${lock.nixpkgs-unstable.revision}.tar.gz";
     updateScript = pkgs.den-http-get-updater {
       fileLocation = lockFile;
+      previousHash = lock.nixpkgs-unstable.sha256;
       previousVersion = lock.nixpkgs-unstable.revision;
       versionUrl = "https://channels.nixos.org/nixos-unstable/git-revision";
-      prefetchList = [{
-        previousHash = lock.nixpkgs-unstable.sha256;
-        prefetchUrlLocation = {
-          file = ./inputs.nix;
-          attrpath = "nixpkgs-unstable.url";
-        };
-      }];
+      prefetchUrlLocation = {
+        file = ./inputs.nix;
+        attrpath = "nixpkgs-unstable.url";
+      };
     };
     outPath = builtins.fetchTarball {
       inherit url;
@@ -71,16 +65,14 @@ let self = {
     url = "https://github.com/lilyinstarlight/nixos-cosmic/archive/${lock.cosmic-modules.revision}.tar.gz";
     updateScript = pkgs.den-http-get-updater {
       fileLocation = lockFile;
+      previousHash = lock.cosmic-modules.sha256;
       previousVersion = lock.cosmic-modules.revision;
       versionUrl = "https://api.github.com/repos/lilyinstarlight/nixos-cosmic/commits";
       contentParser = "jq -rc '.[0].sha' <<< \"$newVersion\"";
-      prefetchList = [{
-        previousHash = lock.cosmic-modules.sha256;
-        prefetchUrlLocation = {
-          file = ./inputs.nix;
-          attrpath = "cosmic-modules.url";
-        };
-      }];
+      prefetchUrlLocation = {
+        file = ./inputs.nix;
+        attrpath = "cosmic-modules.url";
+      };
     };
     outPath = builtins.fetchTarball {
       inherit url;
diff --git a/nix-os/nvidia.nix b/nix-os/nvidia.nix
index 5da8b1d..a9433f3 100644
--- a/nix-os/nvidia.nix
+++ b/nix-os/nvidia.nix
@@ -1,10 +1,4 @@
-{
-  config,
-  lib,
-  pkgs,
-  self,
-  ...
-}:
+{ config, lib, pkgs, ...}:
 
 {
   config = {
@@ -22,79 +16,14 @@
       powerManagement.enable = true;
       open = false;
       nvidiaSettings = true;
-      package = let
-        mkDriverArgs = {
-          version = "570.133.07";
-          sha256_64bit = "sha256-LUPmTFgb5e9VTemIixqpADfvbUX1QoTT2dztwI3E3CY=";
-          sha256_aarch64 = "sha256-yTovUno/1TkakemRlNpNB91U+V04ACTMwPEhDok7jI0=";
-          openSha256 = "sha256-9l8N83Spj0MccA8+8R1uqiXBS0Ag4JrLPjrU3TaXHnM=";
-          settingsSha256 = "sha256-XMk+FvTlGpMquM8aE8kgYK2PIEszUZD2+Zmj2OpYrzU=";
-          persistencedSha256 = "sha256-G1V7JtHQbfnSRfVjz/LE2fYTlh9okpCbE4dfX9oYSg8=";
-        };
-      in ( config.boot.kernelPackages.nvidiaPackages.mkDriver mkDriverArgs ).overrideAttrs (super: {
-        passthru = super.passthru or {} // {
-          urls = {
-            x86_64 = [
-              "https://download.nvidia.com/XFree86/Linux-x86_64/${mkDriverArgs.version}/NVIDIA-Linux-x86_64-${mkDriverArgs.version}.run"
-              "https://us.download.nvidia.com/XFree86/Linux-x86_64/${mkDriverArgs.version}/NVIDIA-Linux-x86_64-${mkDriverArgs.version}.run"
-            ];
-            aarch64 = [
-              "https://us.download.nvidia.com/XFree86/aarch64/${mkDriverArgs.version}/NVIDIA-Linux-aarch64-${mkDriverArgs.version}.run"
-              "https://download.nvidia.com/XFree86/Linux-aarch64/${mkDriverArgs.version}/NVIDIA-Linux-aarch64-${mkDriverArgs.version}.run"
-            ];
-          };
-          updateScript = pkgs.den-http-get-updater {
-            fileLocation = ( builtins.unsafeGetAttrPos "any" { any = null; } ).file;
-            previousVersion = mkDriverArgs.version;
-            versionUrl = "https://raw.githubusercontent.com/aaronp24/nvidia-versions/master/nvidia-versions.txt";
-            extraPackages = with pkgs; [
-              coreutils
-              gawk
-              gnugrep
-            ];
-            contentParser = lib.concatStringsSep " | " [
-              "echo \"$newVersion\""
-              "grep current"
-              "awk '{print $3}'"
-              "sort -V"
-              "tail -n 1"
-            ];
-            unpack = false;
-            prefetchList = lib.map (x: {
-              inherit (x) previousHash;
-              unpack = x.unpack or true;
-              prefetchUrlLocation = {
-                file = builtins.toString self + "/outputs.nix";
-                # TODO: don't use already existing NixOS configuration
-                attrpath = "nixosConfigurations.main.config.hardware.nvidia.package.${x.locationAttrpath}";
-              };
-            }) [
-              {
-                previousHash = mkDriverArgs.sha256_64bit;
-                locationAttrpath = "urls.x86_64";
-                unpack = false;
-              }
-              {
-                previousHash = mkDriverArgs.sha256_aarch64;
-                locationAttrpath = "urls.aarch64";
-                unpack = false;
-              }
-              {
-                previousHash = mkDriverArgs.openSha256;
-                locationAttrpath = "open.src.urls";
-              }
-              {
-                previousHash = mkDriverArgs.settingsSha256;
-                locationAttrpath = "settings.src.urls";
-              }
-              {
-                previousHash = mkDriverArgs.persistencedSha256;
-                locationAttrpath = "persistenced.src.urls";
-              }
-            ];
-          };
-        };
-      });
+      package = config.boot.kernelPackages.nvidiaPackages.mkDriver {
+        version = "570.133.07";
+        sha256_64bit = "sha256-LUPmTFgb5e9VTemIixqpADfvbUX1QoTT2dztwI3E3CY=";
+        sha256_aarch64 = "sha256-yTovUno/1TkakemRlNpNB91U+V04ACTMwPEhDok7jI0=";
+        openSha256 = "sha256-9l8N83Spj0MccA8+8R1uqiXBS0Ag4JrLPjrU3TaXHnM=";
+        settingsSha256 = "sha256-XMk+FvTlGpMquM8aE8kgYK2PIEszUZD2+Zmj2OpYrzU=";
+        persistencedSha256 = "sha256-G1V7JtHQbfnSRfVjz/LE2fYTlh9okpCbE4dfX9oYSg8=";
+      };
     };
     nixpkgs.config.nvidia.acceptLicense = true;
   };
diff --git a/pkgs/by-name/de/den-http-get-updater/package.nix b/pkgs/by-name/de/den-http-get-updater/package.nix
index 484fa35..d22b0ac 100644
--- a/pkgs/by-name/de/den-http-get-updater/package.nix
+++ b/pkgs/by-name/de/den-http-get-updater/package.nix
@@ -2,7 +2,7 @@
   lib,
 
   curl,
-  gnused,
+  gawk,
   jq,
   nix,
   writeScript,
@@ -11,111 +11,67 @@
 {
   # location of file to modify
   fileLocation,
+  previousHash,
   previousVersion,
   versionUrl,
-
-  # {
-  #   fileLocation: string?;
-  #   previousHash: string;
-  #   prefetchUrlLocation: {
-  #     file: string;
-  #     attrpath: string[]'
-  #   };
-  #   prefetchHash: string?;
-  #   targetHash: string?;
-  #   unpack: bool?;
-  #   name: string?;
-  # }[]
-  #
-  prefetchList ? [],
-
-  # extra packages to add to the path
-  extraPackages ? [],
-
+  prefetchUrlLocation ? null,
   # change newVersion variable in it, if the contents of the page
   # is not plaintext version
   # (json for example)
   contentParser ? "echo \"$newVersion\"",
 
   unpack ? true,
-  hashAlgo ? "sha256",
-  hashFormat ? "sri",
+  name ? if unpack then "source" else null,
 }:
 
+assert builtins.isNull prefetchUrlLocation || lib.isAttrs prefetchUrlLocation;
+assert lib.isAttrs prefetchUrlLocation && (
+  lib.isString prefetchUrlLocation.file or null ||
+  lib.isPath prefetchUrlLocation.file or null
+);
+assert lib.isAttrs prefetchUrlLocation && lib.isString prefetchUrlLocation.attrpath or null;
+
 let
   realFileLocation = builtins.toString fileLocation;
+  mark = builtins.hashString "sha256" previousHash;
 
-  prefetchList' = lib.map (x:
-    assert builtins.isNull x.prefetchUrlLocation || lib.isAttrs x.prefetchUrlLocation;
-    assert lib.isAttrs x.prefetchUrlLocation && (
-      lib.isString x.prefetchUrlLocation.file or null ||
-      lib.isPath x.prefetchUrlLocation.file or null
-    );
-    assert lib.isAttrs x.prefetchUrlLocation && lib.isString x.prefetchUrlLocation.attrpath or null;
-    rec {
-      inherit fileLocation hashAlgo hashFormat unpack;
-      name = if x.unpack or unpack then "source" else null;
-      mark = builtins.hashString "sha256" x.previousHash;
-      markRegexEscape = lib.escapeRegex mark;
-      realFileLocation = builtins.toString x.fileLocation or fileLocation;
-      realFileLocationShellEscape = lib.escapeShellArg realFileLocation;
-      prefetchUrlLocationShellEscape = lib.mapAttrs (_: lib.escapeShellArg) x.prefetchUrlLocation;
-      previousHashRegexEscape = lib.escapeRegex x.previousHash;
-  } // x) prefetchList;
+  mark' = lib.escapeShellArg mark;
+  prefetchUrlLocation' = lib.mapAttrs (_: lib.escapeShellArg) prefetchUrlLocation;
+  realFileLocation' = lib.escapeShellArg realFileLocation;
+  versionUrl' = lib.escapeShellArg versionUrl;
 
-  realFileLocationShellEscape = lib.escapeShellArg realFileLocation;
-  versionUrlShellEscape = lib.escapeShellArg versionUrl;
+  mark'' = lib.escapeShellArg (lib.escapeRegex mark);
+  previousVersion'' = lib.escapeShellArg (lib.escapeRegex previousVersion);
 
-  previousVersionRegexEscape = lib.escapeRegex previousVersion;
+  nixUnpack = lib.optionalString unpack "--unpack";
+  nixName = lib.optionalString (!builtins.isNull name) "--name \"${lib.escapeShellArg name}\"";
 
-
-  path = lib.makeBinPath ([
+  path = lib.makeBinPath [
     curl
-    gnused
+    gawk
     jq
     nix
-  ] ++ extraPackages);
+  ];
 in
 
 writeScript "den-http-get-updater" (''
   PATH="${lib.escapeShellArg path}"
-  prefetchFailed=
 
-  newVersion=$(curl -L "${versionUrlShellEscape}")
+  newVersion=$(curl -L "${versionUrl'}")
   if [[ "$?" != 0 ]]; then
     echo "error: fetching new version failed" 1>&2
     exit 1
   fi
   newVersion=$(${contentParser})
-  sed -Ei "s!${previousVersionRegexEscape}!$newVersion!g" "${realFileLocationShellEscape}"
-''
-
-# invalidate hashes
-+ lib.concatStringsSep "\n" (lib.map ({
-  mark,
-  previousHash,
-  previousHashRegexEscape,
-  realFileLocationShellEscape,
-  ...
-}: ''
-  sed -Ei "s!${previousHashRegexEscape}!${mark}!g" "${realFileLocationShellEscape}"
-'') prefetchList')
-
-+ lib.concatStringsSep "\n" (lib.map ({
-  fileLocation,
-  markRegexEscape,
-  name,
-  prefetchUrlLocationShellEscape,
-  realFileLocationShellEscape,
-  unpack,
-  ...
-}: let
-  nixUnpack = lib.optionalString unpack "--unpack";
-  nixName = lib.optionalString (!builtins.isNull name) "--name \"${lib.escapeShellArg name}\"";
-in ''
-  nixUrlsResult=$(nix-instantiate --eval --json --strict \
-    "${prefetchUrlLocationShellEscape.file}" \
-    -A "${prefetchUrlLocationShellEscape.attrpath}"
+  awk -i inplace "{
+    sub(/${previousVersion''}/, \"$newVersion\")
+    # invalidate hash
+    sub(/${previousHash}/, \"${mark'}\")
+  }1" "${realFileLocation'}"
+'' + lib.optionalString (!builtins.isNull prefetchUrlLocation) ''
+  nixUrlsResult=$(nix-instantiate --eval --json \
+    "${prefetchUrlLocation'.file}" \
+    -A "${prefetchUrlLocation'.attrpath}"
   )
 
   urlsType=$(jq -rc 'type' <<< "$nixUrlsResult")
@@ -132,28 +88,19 @@ in ''
   prefetchSucceeded=1
   for url in "''${prefetchUrls[@]}"; do
       echo "trying prefetch '$url'...";
-      expectedHash=$(nix-prefetch-url "$url" ${nixUnpack} ${nixName} --type "${hashAlgo}")
-      expectedHash=$(nix --extra-experimental-features "nix-command" hash convert \
-        --hash-algo "${hashAlgo}" \
-        --to "${hashFormat}" \
-        "$expectedHash"
-      )
+      expectedHash=$(nix-prefetch-url "$url" ${nixUnpack} ${nixName})
       if [[ -n $expectedHash ]]; then
           echo "prefetch succeeded!"
           echo "hash: $expectedHash"
-          sed -Ei "s!${markRegexEscape}!$expectedHash!g" "${realFileLocationShellEscape}"
+          awk -i inplace "{
+            sub(/${mark''}/, \"$expectedHash\")
+          }1" "${realFileLocation'}"
           prefetchSucceeded=
           break
       fi
   done
   if [[ -n "$prefetchSucceeded" ]]; then
       echo "warning: prefetch failed" 1>&2
-      prefetchFailed=1
-  fi
-'') (lib.filter (x: !builtins.isNull x.prefetchUrlLocation) prefetchList'))
-
-+ ''
-  if [[ -n "$prefetchFailed" ]]; then
       exit 1
   fi
 '')
diff --git a/update-list.nix b/update-list.nix
index eaaa200..9ce74c3 100644
--- a/update-list.nix
+++ b/update-list.nix
@@ -11,26 +11,3 @@ in {
   "inputs/cosmic-modules" = inputsWithPackages.cosmic-modules;
   "inputs/nixos-vscode-server" = inputsWithPackages.nixos-vscode-server;
 })
-
-# MARK: NixOS modules
-// ( let
-  pkgs = self.modifiedNixpkgsPure {
-    localSystem = builtins.currentSystem;
-    config.allowUnfree = true;
-  };
-  lib = pkgs.lib;
-  mkUpdater = path: attrpath: extraModule: let
-    system = pkgs.nixos {
-      imports = [ path extraModule ];
-      config = {
-        _module.args = {
-          inherit self;
-          inherit (self) inputs;
-        };
-        system.stateVersion = lib.versions.pad 2 lib.trivial.verison;
-      };
-    };
-  in lib.getAttrFromPath ( [ "config" ] ++ attrpath ) system;
-in {
-  "NixOS/nvidia" = mkUpdater ./nix-os/nvidia.nix [ "hardware" "nvidia" "package" ] {};
-})