Flakify initial commit for Haskell REPL

.envrc

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+use flake

.gitignore

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+.direnv

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1694304580,
+        "narHash": "sha256-5tIpNodDpEKT8mM/F5zCzWEAnidOg8eb1/x3SRaaBLs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "4c8cf44c5b9481a4f093f1df3b8b7ba997a7c760",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-23.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+  };
+
+  outputs = { self, nixpkgs }: {
+    devShell.x86_64-linux =
+      let
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+
+        ghc = pkgs.haskell.packages.ghc924.ghcWithHoogle (self: with self;
+          [
+            relude
+            split
+
+            aeson
+            random
+            neat-interpolation
+          ]
+        );
+      in
+      pkgs.mkShell {
+        buildInputs = with pkgs.haskellPackages; [
+          ghc
+
+          haskell-language-server
+          ghcid
+          hlint
+        ];
+
+      };
+  };
+}