diff --git a/flake.lock b/flake.lock
index ba4170a..e7682e9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,28 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
-        "lastModified": 1644229661,
-        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
         "type": "github"
       },
       "original": {
@@ -17,11 +33,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1646939531,
-        "narHash": "sha256-bxOjVqcsccCNm+jSmEh/bm0tqfE3SdjwS+p+FZja3ho=",
+        "lastModified": 1666869603,
+        "narHash": "sha256-3V53or4Vpu4+LrGfGSh3T2V8+qf5RP6nRuex9GywkwE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fcd48a5a0693f016a5c370460d0c2a8243b882dc",
+        "rev": "2001e2b31c565bcdf7bc13062b8d7cfccaca05b8",
         "type": "github"
       },
       "original": {
@@ -33,6 +49,7 @@
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }

diff --git a/flake.lock b/flake.lock
index ba4170a..e7682e9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,28 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
-        "lastModified": 1644229661,
-        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
         "type": "github"
       },
       "original": {
@@ -17,11 +33,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1646939531,
-        "narHash": "sha256-bxOjVqcsccCNm+jSmEh/bm0tqfE3SdjwS+p+FZja3ho=",
+        "lastModified": 1666869603,
+        "narHash": "sha256-3V53or4Vpu4+LrGfGSh3T2V8+qf5RP6nRuex9GywkwE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fcd48a5a0693f016a5c370460d0c2a8243b882dc",
+        "rev": "2001e2b31c565bcdf7bc13062b8d7cfccaca05b8",
         "type": "github"
       },
       "original": {
@@ -33,6 +49,7 @@
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
diff --git a/flake.nix b/flake.nix
index 3db1ac9..fb6e5b7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,9 +4,13 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils, flake-compat }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs {
@@ -18,5 +22,11 @@
             })
           ];
         };
-      in { devShell = import ./shell.nix { inherit pkgs; }; });
+      in
+      {
+        devShell = with pkgs;
+          mkShell {
+            buildInputs = [ jre ammonite coursier bloop sbt scalafmt nodejs-16_x ];
+          };
+      });
 }

diff --git a/flake.lock b/flake.lock
index ba4170a..e7682e9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,28 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
-        "lastModified": 1644229661,
-        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
         "type": "github"
       },
       "original": {
@@ -17,11 +33,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1646939531,
-        "narHash": "sha256-bxOjVqcsccCNm+jSmEh/bm0tqfE3SdjwS+p+FZja3ho=",
+        "lastModified": 1666869603,
+        "narHash": "sha256-3V53or4Vpu4+LrGfGSh3T2V8+qf5RP6nRuex9GywkwE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fcd48a5a0693f016a5c370460d0c2a8243b882dc",
+        "rev": "2001e2b31c565bcdf7bc13062b8d7cfccaca05b8",
         "type": "github"
       },
       "original": {
@@ -33,6 +49,7 @@
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
diff --git a/flake.nix b/flake.nix
index 3db1ac9..fb6e5b7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,9 +4,13 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils, flake-compat }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs {
@@ -18,5 +22,11 @@
             })
           ];
         };
-      in { devShell = import ./shell.nix { inherit pkgs; }; });
+      in
+      {
+        devShell = with pkgs;
+          mkShell {
+            buildInputs = [ jre ammonite coursier bloop sbt scalafmt nodejs-16_x ];
+          };
+      });
 }
diff --git a/shell.nix b/shell.nix
index 2582231..a34aaa6 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,13 +1,6 @@
-{ pkgs ? import <nixpkgs> {
-  overlays = [
-    (final: prev: rec {
-      jre = prev.adoptopenjdk-hotspot-bin-11;
-      jdk = jre;
-    })
-  ];
-} }:
-
-with pkgs;
-mkShell {
-  buildInputs = [ jre ammonite coursier bloop mill sbt scalafmt nodejs-16_x ];
-}
+(import (let lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+in fetchTarball {
+  url =
+    "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+  sha256 = lock.nodes.flake-compat.locked.narHash;
+}) { src = ./.; }).shellNix
\ No newline at end of file