diff --git a/libraries/droplet/.envrc b/libraries/droplet/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/libraries/droplet/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/libraries/droplet/.gitignore b/libraries/droplet/.gitignore
index d80b04ff..340991a0 100644
--- a/libraries/droplet/.gitignore
+++ b/libraries/droplet/.gitignore
@@ -22,4 +22,6 @@ target/
 
 perf.data
 flamegraph.svg
-*.json
\ No newline at end of file
+*.json
+
+.direnv
\ No newline at end of file
diff --git a/libraries/droplet/flake.lock b/libraries/droplet/flake.lock
new file mode 100644
index 00000000..e0d2640d
--- /dev/null
+++ b/libraries/droplet/flake.lock
@@ -0,0 +1,96 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1768886240,
+        "narHash": "sha256-C2TjvwYZ2VDxYWeqvvJ5XPPp6U7H66zeJlRaErJKoEM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "80e4adbcf8992d3fd27ad4964fbb84907f9478b0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1768963622,
+        "narHash": "sha256-n6VHiUgrYD9yjagzG6ncVVqFbVTsKCI54tR9PNAFCo0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "2ef5b3362af585a83bafd34e7fc9b1f388c2e5e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/libraries/droplet/flake.nix b/libraries/droplet/flake.nix
new file mode 100644
index 00000000..7c806fd3
--- /dev/null
+++ b/libraries/droplet/flake.nix
@@ -0,0 +1,52 @@
+{
+  description = "Drop-OSS app development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      rust-overlay,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+        libraries = with pkgs; [
+            glib
+            glibc
+            openssl
+          ];
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [
+            pkg-config
+            git
+            rust-bin.nightly.latest.default
+            rust-analyzer
+            cargo-expand
+          ];
+
+          
+          buildInputs = libraries;
+
+          shellHook = ''
+            export LD_LIBRARY_PATH="${
+              pkgs.lib.makeLibraryPath libraries
+            }:$LD_LIBRARY_PATH"
+          echo "Downpour development environment loaded"
+          '';
+        };
+      }
+    );
+}
diff --git a/libraries/droplet/src/main.rs b/libraries/droplet/src/main.rs
index 76036a45..baff5528 100644
--- a/libraries/droplet/src/main.rs
+++ b/libraries/droplet/src/main.rs
@@ -1,15 +1,16 @@
-use std::{os::unix::fs::MetadataExt, path::PathBuf};
+use std::{env, os::unix::fs::MetadataExt, path::PathBuf};
 
 use droplet_rs::manifest::generate_manifest_rusty;
-use serde_json::json;
 use tokio::runtime::Handle;
 
 #[tokio::main]
 pub async fn main() {
-    let target_dir =
-        PathBuf::from("/home/decduck/.local/share/Steam/steamapps/common/BloonsTD6");
+    let mut args = env::args();
+    let target_dir = PathBuf::from(args.nth(1).expect("Provide target directory"));
+
     let metrics = Handle::current().metrics();
     println!("using {} workers", metrics.num_workers());
+
     let manifest = generate_manifest_rusty(
         &target_dir,
         |progress| println!("PROGRESS: {}", progress),