Add flake.nix for building on NixOS.HEADmain

1 files changed, 30 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..0bdf16f
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,30 @@
+# SPDX-FileCopyrightText: 2021 Serokell <https://serokell.io/>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+{
+  description = "A minimalist calculator for quick calculations";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        packages.hsc =
+          pkgs.haskellPackages.callCabal2nix "hsc" self {};
+
+        packages.default = self.packages.${system}.hsc;
+        defaultPackage = self.packages.${system}.default;
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [ cabal-install ];
+          inputsFrom = map (__getAttr "env") (__attrValues self.packages.${system});
+        };
+        devShell = self.devShells.${system}.default;
+      });
+}