diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..247a291
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,3 @@
+source_url "https://raw.githubusercontent.com/cachix/devenv/95f329d49a8a5289d31e0982652f7058a189bfca/direnvrc" "sha256-d+8cBpDfDBj41inrADaJt+bDWhOktwslgoP5YiGJ1v0="
+
+use devenv
diff --git a/.gitignore b/.gitignore
index 40e5032..61fb62a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 /_/
+
+.devenv*
+.direnv
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index b29383a..4bf5768 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,9 +1,13 @@
 {
   "recommendations": [
     // general
+    "mkhl.direnv",
     "skellock.just",
     "usernamehw.errorlens",
 
+    // nix
+    "jnoortheen.nix-ide",
+
     // js
     "esbenp.prettier-vscode",
 
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 32abfaa..f7b6338 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -3,6 +3,8 @@
 
   "cSpell.words": [
     "developomp",
+    "devenv",
+    "direnv",
     "fstat",
     "nums",
     "rustup",
@@ -23,6 +25,13 @@
     "editor.defaultFormatter": "esbenp.prettier-vscode"
   },
 
+  "[nix]": {
+    "editor.defaultFormatter": "jnoortheen.nix-ide"
+  },
+  "nix.formatterPath": "nixfmt",
+  "nix.enableLanguageServer": true,
+  "nix.serverPath": "nixd",
+
   "[c]": {
     "editor.defaultFormatter": "ms-vscode.cpptools"
   },
diff --git a/README.md b/README.md
index 7c25c74..c1db225 100644
--- a/README.md
+++ b/README.md
@@ -1,35 +1,20 @@
 # Playground
 
-This is [developomp](https://github.com/developomp)'s vscode-based coding playground.
+This is my coding playground for...
 
-The playground is used to...
-
-- quickly test and benchmark snippets of code
-- solve algorithm problems
+- quickly testing and benchmarking snippets of code
+- solving algorithm problems
+- playing with new tech without having to create and configure a new project
 
 ## Setting up
 
-Setup the following:
-
-- shell (only if you're a Windows user. Get [Git bash](https://git-scm.com/downloads) / [GitHub Desktop](https://desktop.github.com) / [Cygwin](https://cygwin.com/install.html) / ... )
-- [just](https://github.com/casey/just)
-- [hyperfine](https://github.com/sharkdp/hyperfine)
-- [python](https://python.org)
-- [node](https://nodejs.org)
-- [rust](https://rust-lang.org) (recommend using [rustup](https://github.com/rust-lang/rustup))
-- [go](https://go.dev)
-- [clang](https://clang.llvm.org)
-- [GCC](https://gcc.gnu.org)
-- [yasm](https://yasm.tortall.net)
-- [texlive](https://tug.org/texlive)
-
-You can check other dev tools I use and more over [here](https://github.com/developomp/pompup).
+- Install the following:
+  - [devenv](https://devenv.sh/getting-started)
+  - [direnv](https://devenv.sh/automatic-shell-activation)
 
 ## Usage
 
-Simply call just recipes using the `just` command runner CLI.
-
-Examples:
+Run [just](https://github.com/casey/just) recipes:
 
 ```bash
 just run-go # automatically build go code before running it and pass arguments from input.txt
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..2305638
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,116 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1728740426,
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "ef61728d91ad5eb91f86cdbcc16070602e7afa16",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1728538411,
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "b69de56fac8c2b6f8fd27f2eca01dcda8e0a4221",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1728627514,
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c505ebf777526041d792a49d5f6dd4095ea391a7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1728778939,
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "ff68f91754be6f3427e4986d7949e6273659be1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs",
+        "pre-commit-hooks": "pre-commit-hooks"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..3271569
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,75 @@
+{ pkgs, ... }:
+
+{
+  packages = with pkgs; [
+    just
+    hyperfine
+
+    ruff
+    yasm
+    nixfmt-rfc-style
+  ];
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/c.nix
+  # https://devenv.sh/supported-languages/c
+  languages.c.enable = true;
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/cplusplus.nix
+  # https://devenv.sh/supported-languages/cplusplus
+  languages.cplusplus.enable = true;
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/go.nix
+  # https://devenv.sh/supported-languages/go
+  languages.go.enable = true;
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/javascript.nix
+  # https://devenv.sh/supported-languages/javascript
+  languages.javascript = {
+    enable = true;
+    directory = "./js";
+
+    pnpm.enable = true;
+    bun.enable = true;
+  };
+
+  # https://devenv.sh/supported-languages/typescript
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/nix.nix
+  # https://devenv.sh/supported-languages/nix
+  languages.nix = {
+    enable = true;
+    lsp.package = pkgs.nixd;
+  };
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/php.nix
+  # https://devenv.sh/supported-languages/php
+  languages.php.enable = true;
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/python.nix
+  # https://devenv.sh/supported-languages/python
+  languages.python = {
+    enable = true;
+    directory = "./py";
+
+    venv.enable = true;
+  };
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/rust.nix
+  # https://devenv.sh/supported-languages/rust
+  languages.rust.enable = true;
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/texlive.nix
+  # https://devenv.sh/supported-languages/texlive
+  languages.texlive = {
+    enable = true;
+
+    # texlive is broken rn
+    # https://github.com/cachix/devenv/issues/1521
+    # https://github.com/Glavin001/atom-beautify/issues/1792#issuecomment-327071117
+    # base = pkgs.texliveFull;
+  };
+
+  # https://github.com/cachix/devenv/blob/main/src/modules/languages/zig.nix
+  # https://devenv.sh/supported-languages/zig
+  languages.zig.enable = true;
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..397b9cb
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,7 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+
+inputs:
+  nixpkgs:
+    url: github:nixos/nixpkgs/nixpkgs-unstable
+
+allowUnfree: true