diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
index 6af2ffb..32166b7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+.direnv
+
 # https://github.com/github/gitignore/blob/main/Python.gitignore
 # Basic .gitignore for a python repo.
 
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..03ddbbf
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,12 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    poetry
+    python3
+    (python310Packages.opencv4.override {
+      enableGtk2 = true;
+      gtk2 = pkgs.gtk2;
+    })
+  ];
+}