diff --git a/flake.lock b/flake.lock
index ff6e3c6..a27e6f0 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,21 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1641205782,
+        "narHash": "sha256-4jY7RCWUoZ9cKD8co0/4tFARpWB+57+r1bLLvXNJliY=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b7547d3eed6f32d06102ead8991ec52ab0a4f1a7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1642609835,
@@ -17,6 +33,7 @@
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index bc19d75..88aa205 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,7 +4,13 @@
   # Nixpkgs / NixOS version to use.
   inputs.nixpkgs.url = "nixpkgs/nixos-21.11";
 
-  outputs = { self, nixpkgs }:
+  # flake-compat for default.nix compatibility
+  inputs.flake-compat = {
+    url = github:edolstra/flake-compat;
+    flake = false;
+  };
+
+  outputs = { self, nixpkgs, flake-compat }:
     let
 
       # Generate a user-friendly version number.