diff --git a/extras/fprintclear.py b/extras/fprintclear.py
new file mode 100755
index 0000000..5baf8d3
--- /dev/null
+++ b/extras/fprintclear.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env -S nix-shell -p gobject-introspection libfprint gusb 'python3.withPackages (p: with p; [pygobject3])' --run python3
+
+import gi
+gi.require_version('FPrint', '2.0')
+from gi.repository import FPrint
+
+ctx = FPrint.Context()
+
+for dev in ctx.get_devices():
+    print(dev)
+    print(dev.get_driver())
+    print(dev.props.device_id);
+
+    dev.open_sync()
+
+    dev.clear_storage_sync()
+    print("All prints deleted.")
+
+    dev.close_sync()
diff --git a/flake.lock b/flake.lock
index 0a61866..e08f9f6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -21,21 +21,6 @@
         "type": "github"
       }
     },
-    "crane": {
-      "locked": {
-        "lastModified": 1727974419,
-        "narHash": "sha256-WD0//20h+2/yPGkO88d2nYbb23WMWYvnRyDQ9Dx4UHg=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "37e4f9f0976cb9281cd3f0c70081e5e0ecaee93f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
     "determinate": {
       "inputs": {
         "determinate-nixd-aarch64-darwin": "determinate-nixd-aarch64-darwin",
@@ -172,24 +157,6 @@
         "type": "github"
       }
     },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems_2"
-      },
-      "locked": {
-        "lastModified": 1726560853,
-        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "git-hooks-nix": {
       "inputs": {
         "flake-compat": [
@@ -229,30 +196,6 @@
         "type": "github"
       }
     },
-    "helix": {
-      "inputs": {
-        "crane": "crane",
-        "flake-utils": "flake-utils",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-overlay": "rust-overlay"
-      },
-      "locked": {
-        "lastModified": 1736619243,
-        "narHash": "sha256-o+LmzQToDudSGrB1U7MaYrwt7soc+TLNV7rKtlitgN4=",
-        "owner": "mattwparas",
-        "repo": "helix",
-        "rev": "a9d5557a3b3c11767432bdacd36ccb3bea02bfa5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mattwparas",
-        "ref": "steel-event-system",
-        "repo": "helix",
-        "type": "github"
-      }
-    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -529,7 +472,6 @@
         "agenix": "agenix",
         "determinate": "determinate",
         "disko": "disko",
-        "helix": "helix",
         "home-manager": "home-manager_2",
         "nixos": "nixos",
         "nixos-cosmic": "nixos-cosmic",
@@ -539,27 +481,6 @@
         "zen-browser": "zen-browser"
       }
     },
-    "rust-overlay": {
-      "inputs": {
-        "nixpkgs": [
-          "helix",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1728268235,
-        "narHash": "sha256-lJMFnMO4maJuNO6PQ5fZesrTmglze3UFTTBuKGwR1Nw=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "25685cc2c7054efc31351c172ae77b21814f2d42",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,
@@ -575,21 +496,6 @@
         "type": "github"
       }
     },
-    "systems_2": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
     "zen-browser": {
       "inputs": {
         "nixpkgs": [
diff --git a/flake.nix b/flake.nix
index bc8f6f9..ea5473c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,10 +21,10 @@
     #   url = "github:pjones/plasma-manager";
     #   inputs.nixpkgs.follows = "nixpkgs";
     # };
-    helix = {
-      url = "github:mattwparas/helix/steel-event-system";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    # helix = {
+    #   url = "github:mattwparas/helix/steel-event-system";
+    #   inputs.nixpkgs.follows = "nixpkgs";
+    # };
     nixos-cosmic = {
       url = "github:lilyinstarlight/nixos-cosmic";
       inputs.nixpkgs.follows = "nixpkgs";
diff --git a/systems/BASED.nix b/systems/BASED.nix
index e3e0392..0867b3e 100644
--- a/systems/BASED.nix
+++ b/systems/BASED.nix
@@ -180,9 +180,6 @@
   };
   nixpkgs.config = {allowUnfree = true;};
   nix.nixPath = ["nixpkgs=${pkgs.path}"];
-  nix.extraOptions = ''
-    trusted-users = root tao
-  '';
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   system.stateVersion = lib.mkDefault "23.05";
diff --git a/users/tao/HOME.nix b/users/tao/HOME.nix
index db3b435..299b691 100644
--- a/users/tao/HOME.nix
+++ b/users/tao/HOME.nix
@@ -26,7 +26,8 @@ in {
     source = ./autostart;
     recursive = true;
   };
-  home.file.".config/direnv/lib/uv.sh".source = ./uv.sh;
+  home.file.".config/direnv/lib/uv.sh".source = ./direnv/uv.sh;
+  home.file.".config/direnv/lib/devenv.sh".source = ./direnv/devenv.sh;
 
   programs = {
     bacon = {
diff --git a/users/tao/direnv/devenv.sh b/users/tao/direnv/devenv.sh
new file mode 100644
index 0000000..d53fcfd
--- /dev/null
+++ b/users/tao/direnv/devenv.sh
@@ -0,0 +1,146 @@
+# shellcheck shell=bash
+# adapted from https://github.com/nix-community/nix-direnv/blob/master/direnvrc
+
+REQUIRED_DIRENV_VERSION="2.21.3"
+
+_nix_direnv_preflight () {
+  if [[ -z "$direnv" ]]; then
+    printf '%s\n' "\$direnv environment variable was not defined. Was this script run inside direnv?"
+    exit 1
+  fi
+
+  if [[ -z ${DEVENV_BIN:-} ]]; then
+    DEVENV_BIN=$(command -v devenv)
+    if [[ -z "${DEVENV_BIN}" ]]; then
+      log_error "command not found: devenv, see https://devenv.sh/getting-started/"
+      exit 1
+    fi
+  fi
+
+  if ! has direnv_version || ! direnv_version "$REQUIRED_DIRENV_VERSION" 2>/dev/null; then
+    log_error "base direnv version is older than the required v$REQUIRED_DIRENV_VERSION."
+    exit 1
+  fi
+
+  local layout_dir
+  layout_dir=$(direnv_layout_dir)
+
+  if [[ ! -d "$layout_dir" ]]; then
+    mkdir -p "$layout_dir"
+  fi
+
+  export DEVENV_DIRENVRC_VERSION=1
+  export DEVENV_DIRENVRC_ROLLING_UPGRADE=1
+}
+
+_nix_export_or_unset() {
+  local key=$1 value=$2
+  if [[ "$value" == __UNSET__ ]]; then
+    unset "$key"
+  else
+    export "$key=$value"
+  fi
+}
+
+_nix_import_env() {
+  local env=$1
+
+  # Note which environments are active, but make sure we don't repeat them
+  if [[ ! "''${DIRENV_ACTIVE-}" =~ (^|:)"$PWD"(:|$) ]]; then
+    export DIRENV_ACTIVE="$PWD:''${DIRENV_ACTIVE-}"
+  fi
+
+  local old_nix_build_top=${NIX_BUILD_TOP:-__UNSET__}
+  local old_tmp=${TMP:-__UNSET__}
+  local old_tmpdir=${TMPDIR:-__UNSET__}
+  local old_temp=${TEMP:-__UNSET__}
+  local old_tempdir=${TEMPDIR:-__UNSET__}
+  local old_xdg_data_dirs=${XDG_DATA_DIRS:-}
+  eval "$env"
+  # `nix print-dev-env` will create a temporary directory and use it as TMPDIR
+  # We cannot rely on this directory being available at all times,
+  # as it may be garbage collected.
+  # Instead - just remove it immediately.
+  # Use recursive & force as it may not be empty.
+  if [[ -n "${NIX_BUILD_TOP+x}" && "$NIX_BUILD_TOP" == */nix-shell.* && -d "$NIX_BUILD_TOP" ]]; then
+    rm -rf "$NIX_BUILD_TOP"
+  fi
+
+  _nix_export_or_unset NIX_BUILD_TOP "$old_nix_build_top"
+  _nix_export_or_unset TMP "$old_tmp"
+  _nix_export_or_unset TMPDIR "$old_tmpdir"
+  _nix_export_or_unset TEMP "$old_temp"
+  _nix_export_or_unset TEMPDIR "$old_tempdir"
+  local new_xdg_data_dirs=${XDG_DATA_DIRS:-}
+  export XDG_DATA_DIRS=
+  local IFS=:
+  for dir in $new_xdg_data_dirs${old_xdg_data_dirs:+:}$old_xdg_data_dirs; do
+    dir="${dir%/}" # remove trailing slashes
+    if [[ :$XDG_DATA_DIRS: = *:$dir:* ]]; then
+      continue # already present, skip
+    fi
+    XDG_DATA_DIRS="$XDG_DATA_DIRS${XDG_DATA_DIRS:+:}$dir"
+  done
+}
+
+nix_direnv_watch_file() {
+  log_error "nix_direnv_watch_file is deprecated. Use watch_file instead."
+  watch_file "$@"
+}
+
+_devenv_watches() {
+  local path=$1
+  local -n _watches=$2
+  if [[ -f "$path" ]]; then
+    while IFS= read -r file; do
+      file=$(printf "$file")
+      _watches+=("$file")
+    done < "$path"
+  fi
+}
+
+use_devenv() {
+  _nix_direnv_preflight
+
+  flake_expr="${1:-.}"
+  flake_dir="${flake_expr%#*}"
+  env_deps_path="$flake_dir/.devenv/input-paths.txt"
+
+  local default_watches
+  default_watches=(".envrc" "$HOME/.direnvrc" "$HOME/.config/direnv/direnvrc")
+
+  if [[ -d "$flake_dir" ]]; then
+    default_watches+=("$flake_dir/devenv.nix" "$flake_dir/devenv.lock" "$flake_dir/devenv.yaml" "$flake_dir/devenv.local.nix")
+
+    if [[ -f "$flake_dir/devenv.yaml" ]]; then
+      if ! devenv assemble; then
+        log_error "$(devenv version) failed to parse devenv.yaml, make sure to use version 0.6 or newer and fix the errors above."
+        exit 0
+      fi
+    fi
+  fi
+
+  # Watch the default files.
+  # Even if evaluation fails, these files should still trigger a reload.
+  watch_file "${default_watches[@]}"
+
+  # Fetch and watch files that affect the env
+  local env_watches
+  _devenv_watches "$env_deps_path" env_watches
+  watch_file "${env_watches[@]}"
+
+  # Build the environment
+  local env
+  if ! env=$("${DEVENV_BIN}" print-dev-env); then
+    log_error "failed to build the devenv environment. devenv.nix may contain errors. see above."
+    exit 0
+  fi
+
+  # Re-watch files that affect the env
+  local env_watches
+  _devenv_watches "$env_deps_path" env_watches
+  watch_file "${env_watches[@]}"
+
+  # Import the environment
+  _nix_import_env "$env"
+}
diff --git a/users/tao/uv.sh b/users/tao/direnv/uv.sh
similarity index 100%
rename from users/tao/uv.sh
rename to users/tao/direnv/uv.sh
diff --git a/users/tao/helix.nix b/users/tao/helix.nix
index 5a8648a..177d64f 100644
--- a/users/tao/helix.nix
+++ b/users/tao/helix.nix
@@ -242,6 +242,6 @@
     };
     enable = true;
     defaultEditor = true;
-    package = inputs.helix.packages.${pkgs.system}.default;
+    # package = inputs.helix.packages.${pkgs.system}.default;
   };
 }
diff --git a/users/tao/nushell/stuff.nu b/users/tao/nushell/stuff.nu
index b5ae567..fec4ce6 100644
--- a/users/tao/nushell/stuff.nu
+++ b/users/tao/nushell/stuff.nu
@@ -76,9 +76,9 @@ def nr [package] {
   }
 
   if ($builders == "") {
-    sudo systemd-inhibit nice -n19 nixos-rebuild $subcommand --flake /home/tao/projects/NOflake/ --impure --verbose --builders ""
+    sudo systemd-inhibit nice -n19 nixos-rebuild $subcommand --flake . --impure --verbose --builders ""
   } else {
-    sudo systemd-inhibit nice -n19 nixos-rebuild $subcommand --flake /home/tao/projects/NOflake/ --impure --verbose ...$rest
+    sudo systemd-inhibit nice -n19 nixos-rebuild $subcommand --flake . --impure --verbose ...$rest
   }
   toastify send rebuild done!
 }