flake.nix: add

flake.nix

@@ -0,0 +1,28 @@
+{
+  inputs = {
+    bellroy-nix-foss = {
+      url = "github:bellroy/bellroy-nix-foss";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    nixpkgs.url = "github:nixos/nixpkgs";
+  };
+
+  outputs = inputs:
+    inputs.bellroy-nix-foss.lib.haskellProject {
+      cabalPackages = [
+        {
+          name = "servant-activeresource";
+          path = ./servant-activeresource.nix;
+        }
+      ];
+      supportedCompilers = [ "ghc8107" "ghc92" "ghc94" ];
+      defaultCompiler = "ghc92";
+#      haskellPackagesOverride = { compilerName, haskellLib, final, prev }:
+#        if compilerName == "ghc94"
+#        then {
+#          # hal doesn't support newer hedgehog
+#          hedgehog = haskellLib.compose.dontCheck (prev.callHackage "hedgehog" "1.1.2" { });
+#        }
+#        else { };
+    };
+}