feat(nix): compat default.nix && shell.nix

default.nix

@@ -0,0 +1 @@
+(import ./util/compat.nix).defaultNix

flake.nix

@@ -27,6 +27,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    flake-compat = {
+      url = "github:inclyc/flake-compat";
+      flake = false;
+    };
+
     deploy-rs = {
       url = "github:serokell/deploy-rs";
       inputs.nixpkgs.follows = "nixpkgs";

shell.nix

@@ -0,0 +1 @@
+(import ./util/compat.nix).shellNix

util/compat.nix

@@ -0,0 +1,10 @@
+let lock = builtins.fromJSON (builtins.readFile ../flake.lock);
+in
+import
+  (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 = ../.;
+  }