diff --git a/.config/nvim/lazy-lock.json b/.config/nvim/lazy-lock.json
index 52f9c7f9..3a97f25e 100644
--- a/.config/nvim/lazy-lock.json
+++ b/.config/nvim/lazy-lock.json
@@ -38,6 +38,5 @@
   "vim-fugitive": { "branch": "master", "commit": "61b51c09b7c9ce04e821f6cf76ea4f6f903e3cf4" },
   "vim-repeat": { "branch": "master", "commit": "65846025c15494983dafe5e3b46c8f88ab2e9635" },
   "vim-sleuth": { "branch": "master", "commit": "be69bff86754b1aa5adcbb527d7fcd1635a84080" },
-  "vim-surround": { "branch": "master", "commit": "3d188ed2113431cf8dac77be61b842acb64433d9" },
-  "vimtex": { "branch": "master", "commit": "2e1bbabeb2c34bb17d7bc8cfdf8f95b16dd0db0c" }
+  "vim-surround": { "branch": "master", "commit": "3d188ed2113431cf8dac77be61b842acb64433d9" }
 }
diff --git a/.config/nvim/lua/_lazy.lua b/.config/nvim/lua/_lazy.lua
index 9e228094..3b2e9541 100644
--- a/.config/nvim/lua/_lazy.lua
+++ b/.config/nvim/lua/_lazy.lua
@@ -114,12 +114,6 @@ local plugins = {
     },
     -- The haskell lexer
     "vim-scripts/alex.vim",
-    {
-        -- https://github.com/lervag/vimtex#lazynvim
-        "lervag/vimtex",
-        lazy = false,
-        version = "^2",
-    },
     {
         "nvim-telescope/telescope.nvim",
         branch = "0.1.x",
diff --git a/nix/configurations/vanadium/nixos/display.nix b/nix/configurations/vanadium/nixos/display.nix
index 43e9f953..cccc8ef2 100644
--- a/nix/configurations/vanadium/nixos/display.nix
+++ b/nix/configurations/vanadium/nixos/display.nix
@@ -69,7 +69,7 @@
               device, # obtain with `xrandr`
               brightness, # [0..1]
             }:
-            singleton "10_xrandr_brightness" /* bash */ ''
+            singleton "10_xrandr_brightness" ''
               ${lib.getExe pkgs.xorg.xrandr} --output ${device} --brightness ${toString brightness}
             '';
 
@@ -79,7 +79,7 @@
               modelName, # obtain with `ddcutil detect`
               brightness, # [0..1]
             }:
-            singleton "10_ddc_brightness" /* bash */ ''
+            singleton "10_ddc_brightness" ''
               ${lib.getExe pkgs.ddcutil} --model ${modelName} setvcp 10 ${
                 toString (builtins.floor (brightness * 100))
               }
@@ -90,7 +90,7 @@
               modelName, # obtain with `ddcutil detect`
               contrast, # [0..1]
             }:
-            singleton "10_ddc_contrast" /* bash */ ''
+            singleton "10_ddc_contrast" ''
               ${lib.getExe pkgs.ddcutil} --model ${modelName} setvcp 12 ${
                 toString (builtins.floor (contrast * 100))
               }
diff --git a/nix/packages/by-name/tmux-sessionizer/package.nix b/nix/packages/by-name/tmux-sessionizer/package.nix
index 63c7cbc1..63ebfc67 100644
--- a/nix/packages/by-name/tmux-sessionizer/package.nix
+++ b/nix/packages/by-name/tmux-sessionizer/package.nix
@@ -8,6 +8,24 @@
   symlinkJoin,
 }:
 let
+  tmux-register-session = writeShellApplication {
+    name = "__tmux-register-session";
+    runtimeInputs = [ tmux ];
+    text = ''
+      last=/tmp/TMUX_LAST
+
+      # bail if tmux not running
+      if ! pgrep tmux >/dev/null 2>&1; then
+        exit 1
+      fi
+
+      this="$(tmux display-message -p '#S')"
+      if [ ! -f "$last" ] || [ "$(cat "$last")" != "$this" ]; then
+          echo "$this" >"$last"
+      fi
+    '';
+  };
+
   tmux-maybe-create = writeShellApplication {
     name = "__tmux-maybe-create";
     runtimeInputs = [
@@ -76,6 +94,7 @@ let
       esac
 
       # effects
+      ${lib.getExe tmux-register-session} || :
       ${lib.getExe tmux-maybe-create} "$session_name" "$selected"
       ${lib.getExe tmux-attach-or-switch} "$session_name"
     '';
@@ -84,6 +103,7 @@ in
 symlinkJoin {
   name = "tmux-sessionizer";
   paths = [
+    tmux-register-session
     tmux-maybe-create
     tmux-attach-or-switch
     tmux-sessionizer