diff --git a/flake.nix b/flake.nix
index 4e417e7f..875fa432 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,6 @@
         ./flake/legacyPackages.nix
         ./flake/overlays.nix
         ./flake/packages.nix
-        ./flake/develop.nix
       ];
 
       flake = {
@@ -57,7 +56,20 @@
         };
       };
 
-      perSystem = {pkgs, ...}: {
+      perSystem = {
+        self',
+        config,
+        pkgs,
+        ...
+      }: {
+        devShells = {
+          default = self'.devShells.lsp;
+          nvim-nix = pkgs.mkShell {packages = [config.packages.nix];};
+          lsp = pkgs.mkShell {
+            packages = with pkgs; [nil statix deadnix alejandra];
+          };
+        };
+
         # Provide the default formatter. `nix fmt` in project root
         # will format available files with the correct formatter.
         # P.S: Please do not format with nixfmt! It messes with many
diff --git a/flake/develop.nix b/flake/develop.nix
deleted file mode 100644
index 7b645288..00000000
--- a/flake/develop.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{lib, ...}: {
-  perSystem = {
-    pkgs,
-    config,
-    self',
-    ...
-  }: {
-    devShells = {
-      default = self'.devShells.lsp;
-      nvim-nix = pkgs.mkShellNoCC {packages = [config.packages.nix];};
-      lsp = pkgs.mkShellNoCC {
-        packages = with pkgs; [nil statix deadnix alejandra];
-      };
-    };
-
-    # This package exists to make development easier by providing the place and
-    # boilerplate to build a test nvf configuration. Feel free to use this for
-    # testing, but make sure to discard the changes before creating a pull
-    # request.
-    packages.dev = let
-      configuration = {};
-
-      customNeovim = lib.nvim.neovimConfiguration {
-        inherit pkgs;
-        modules = [configuration];
-      };
-    in
-      customNeovim.neovim;
-  };
-}
diff --git a/modules/plugins/completion/nvim-cmp/config.nix b/modules/plugins/completion/nvim-cmp/config.nix
index cfd3e53a..b50d7266 100644
--- a/modules/plugins/completion/nvim-cmp/config.nix
+++ b/modules/plugins/completion/nvim-cmp/config.nix
@@ -10,8 +10,6 @@
   inherit (lib.nvim.attrsets) mapListToAttrs;
   inherit (builtins) attrNames typeOf tryEval concatStringsSep;
 
-  borders = config.vim.ui.borders.plugins.nvim-cmp;
-
   cfg = config.vim.autocomplete.nvim-cmp;
   luasnipEnable = config.vim.snippets.luasnip.enable;
   getPluginName = plugin:
@@ -83,9 +81,10 @@ in {
         setupOpts = {
           sources = map (s: {name = s;}) (attrNames cfg.sources);
 
-          window = mkIf borders.enable {
-            completion.border = borders.style;
-            documentation.border = borders.style;
+          # TODO: try to get nvim-cmp to follow global border style
+          window = mkIf config.vim.ui.borders.enable {
+            completion = mkLuaInline "cmp.config.window.bordered()";
+            documentation = mkLuaInline "cmp.config.window.bordered()";
           };
 
           formatting.format = cfg.format;
diff --git a/modules/plugins/completion/nvim-cmp/nvim-cmp.nix b/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
index 06282b6e..d63ed732 100644
--- a/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
+++ b/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
@@ -72,7 +72,7 @@ in {
     };
 
     format = mkOption {
-      type = nullOr luaInline;
+      type = luaInline;
       default = mkLuaInline ''
         function(entry, vim_item)
           vim_item.menu = (${toLuaObject cfg.sources})[entry.source.name]