diff --git a/nix/base-system/flake.nix b/nix/base-system/flake.nix
index 3f85155..c1a1d4c 100644
--- a/nix/base-system/flake.nix
+++ b/nix/base-system/flake.nix
@@ -29,9 +29,13 @@
       age = agenix-flake.packages."${system}".default;
     in { config, pkgs, ... }: let
 		nvim-treesitter-csharp = pkgs.callPackage ./nvim-treesitter-csharp.nix {
-		    buildGrammar = pkgs.tree-sitter.buildGrammar;
-			fetchFromGitHub = pkgs.fetchFromGitHub;
+		    inherit (pkgs.tree-sitter) buildGrammar;
+			inherit (pkgs) fetchFromGitHub;
 		};
+        possession-nvim = pkgs.callPackage ./possession-nvim.nix {
+            inherit (pkgs.vimUtils) buildVimPlugin;
+			inherit (pkgs) fetchFromGitHub;
+        };
 		expected-parsers = (pkgs.lib.attrVals [
 		  "tree-sitter-rust"
           "tree-sitter-lua"
@@ -77,8 +81,8 @@
             customRC = "lua << EOF
 ${builtins.readFile ./init.lua}
 EOF";
-            packages.myVimPackage = with pkgs.vimPlugins; {
-              start = [
+            packages.myVimPackage = {
+              start = (with pkgs.vimPlugins; [
                 nvim-tree-lua
                 nvim-lspconfig
                 packer-nvim
@@ -107,7 +111,7 @@ EOF";
                 telescope-nvim
                 telescope-lsp-handlers-nvim
                 plenary-nvim
-              ];
+              ]) ++ [ possession-nvim ];
             };
           };
 
diff --git a/nix/base-system/init.lua b/nix/base-system/init.lua
index a13db24..129776c 100644
--- a/nix/base-system/init.lua
+++ b/nix/base-system/init.lua
@@ -411,11 +411,37 @@ vim.keymap.set("n", "<Leader>mg", function()
     vim.cmd("MagitOnly")
 end)
 
+require('possession').setup{
+    commands = {
+        save = 'SSave',
+        load = 'SLoad',
+        delete = 'SDelete',
+        list = 'SList',
+    },
+    autosave = {
+        current = true,
+        on_load = true,
+        on_quit = true,
+    },
+    telescope = {
+        list = {
+            default_action = 'load',
+            mappings = {
+                save = { n = '<c-x>', i = '<c-x>' },
+                load = { n = '<c-v>', i = '<c-v>' },
+                delete = { n = '<c-t>', i = '<c-t>' },
+                rename = { n = '<c-r>', i = '<c-r>' },
+            },
+        },
+    },
+}
+
 -- Telelscope configuration
 local telescope = require('telescope')
 local telescope_builtins = require('telescope.builtin')
 local telescope_actions = require('telescope.actions')
 
+telescope.load_extension('possession')
 -- https://github.com/nvim-telescope/telescope.nvim 
 telescope.setup({
 	defaults = {
@@ -428,6 +454,7 @@ telescope.setup({
 	},
 })
 
+vim.keymap.set("n", "<leader>pl", telescope.extensions.possession.list)
 vim.keymap.set("n", "<Leader>nff", telescope_builtins.fd)
 vim.keymap.set("n", "<Leader>rl", telescope_builtins.lsp_references)
 vim.keymap.set("n", "<Leader>rn", vim.lsp.buf.rename)
diff --git a/nix/base-system/nvim-treesitter-csharp.nix b/nix/base-system/nvim-treesitter-csharp.nix
index c09200b..a00dd65 100644
--- a/nix/base-system/nvim-treesitter-csharp.nix
+++ b/nix/base-system/nvim-treesitter-csharp.nix
@@ -6,6 +6,6 @@ buildGrammar {
         owner = "tree-sitter";
         repo = "tree-sitter-c-sharp";
         rev = "1648e21b4f087963abf0101ee5221bb413107b07";
-        hash = "sha256-WvkHtw8t14UNqiJvmS9dbGYQSVVzHS9mcWzxq+KLMnU=";#pkgs.lib.fakeHash;
+        hash = "sha256-WvkHtw8t14UNqiJvmS9dbGYQSVVzHS9mcWzxq+KLMnU=";
     };
 }
diff --git a/nix/base-system/possession-nvim.nix b/nix/base-system/possession-nvim.nix
new file mode 100644
index 0000000..a1bc7bf
--- /dev/null
+++ b/nix/base-system/possession-nvim.nix
@@ -0,0 +1,11 @@
+{buildVimPlugin, fetchFromGitHub, ...}:
+buildVimPlugin {
+    pname = "possession.nvim";
+    version = "2023-09-10";
+    src = fetchFromGitHub {
+        owner = "jedrzejboczar";
+        repo = "possession.nvim";
+        rev = "9fef60176e1dbb28b9216ae288029be2e27f0e40";
+        hash = "sha256-kiKoDSyu0TXj+lcLS+f+9NEOYAZV6YH4xPa7ZzY696Y";
+    };
+}
diff --git a/nix/darwin/flake.lock b/nix/darwin/flake.lock
index 066013f..0f2611a 100644
--- a/nix/darwin/flake.lock
+++ b/nix/darwin/flake.lock
@@ -34,12 +34,12 @@
       },
       "locked": {
         "lastModified": 1,
-        "narHash": "sha256-ssLNR+zsRahPClwxaYQlNbKeAzOOgVVCLIdvHLycmG8=",
-        "path": "/nix/store/8fmmlzxglqwwlliigfwg1x7d6s1kmky7-source/nix/base-system",
+        "narHash": "sha256-vks0c+ByEs5/F4x6nMkDecgUAXOLNnVSxaSJEoywhRg=",
+        "path": "/nix/store/fb05dg2zd1hl4kpmwjfynp3a9hpkdmwz-source/nix/base-system",
         "type": "path"
       },
       "original": {
-        "path": "/nix/store/8fmmlzxglqwwlliigfwg1x7d6s1kmky7-source/nix/base-system",
+        "path": "/nix/store/fb05dg2zd1hl4kpmwjfynp3a9hpkdmwz-source/nix/base-system",
         "type": "path"
       }
     },